This is an excellent video, I went through so many video on internet but could not understand the basic concept behind Profibus DP and Profibus PA . It help me to understand the concept of Profibus and also helped to understand the difference between Profibus PA and Profibus DP.
Hi Sachin, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!
Outstanding video. It would be even better if you could add real life examples of explained topics. Nonetheless, the absolute best channel about automation on youtube.
Realpars videos were great in helping me prepare for my interview, and I got the job. Kudos guys. Q: The cables from the sensors or transmitters to the PA Bus, are they also profibus PA cables?
Great news on your interview! Best of luck in your new job! Yes, Profibus PA cables are used to join individual sensors to the PA bus as well as make up the bus itself. The cable is single pair 18AWG stranded tinned copper, insulated, shielded cable with PVC outer jacket, usually orange in color.
Profibus PA is used to communicate directly with the device (transmitter, sensor, etc.). The data resides in the device and is transferred to/from the PLC without having to go through a remote I/O subsystem (interface card, analog and digital I/O cards, etc.). This simplifies the cabling and structure for communicating with the field devices.
Hi... real pars is doing great job. My doubt is about the protocol and physical cables. Like modubus RTU, TCP/IP, RS 485, 422, foundation fieldbus, profibus, Ethernet, profinet etc.. Among these which one is protocol and which one is physical cable. Thank you.
Thanks for the good video, however some comments: When you explain in profibus DP the sensors are connected to the I/O, you should clarify what kind of connection, e.g analog 4-20ma?. When using profibus PA, same type of sensors can be used?
4-20ma transmitters develop an analog signal by varying the current along the wire connected to the analog input card. ProfibusPA is completely different. ProfibusPA and 4-20ma are not compatible. For ProfiBus PA, you will need a different transmitter, cabling, power supply and communication card. ProfiBusPA is a digital communication protocol, not analog like 4-20ma. Each transmitter is considered a node and is configured with software provided by the host controller. ProfibusPA devices can communicate much more data than the single PV variable of analog transmitters, incuding PV, totalizer values, sensor health, and configuration parameters (like range and alarm setpoints),
Typically a transmitter or other interface electronics is used to connect the sensor/device to the PA bus. You must have a Profibus-PA enabled connection/interface to place a sensor on the Profibus PA segment.
Thanks for the knowledge sharing.... Some questions...Does that means the same software configuration is used in both protocol...? The sensors or transmitter used are they the normal ones found in the field or they are specially made for this Profibus-PA network (the port that's why I asked)....?
The sensor needs to have the electronics to be able to interface to ProfibusPA. Modern sensors/transmitters are able to be specified with a number of different interface cards installed. If your plant uses ProfibusPA, then the sensors/transmitters need to be purchased with ProfibusPA interface cards. Your sensor electronics need to match your instrument bus type. ProfibusPA and ProfibusDP have different data packet structures and baud rates for communication. TIA Portal can be used to configure many aspects of each protocol, so although the front-end may look similar, the packets used in communication are not.
Thanks for your comment! That would make for a great topic suggestion, I will happily forward this to our course developers. Thanks for sharing and happy learning!
Thank you for the simple explanation.. I am wondering if the Profibus PA is an replacement of HART protocol and what is the difference between these two protocols.
Yes, HART and ProfibusPA are very similar in the type of data that is provided between the sensor and control system. HART is somewhat simpler, since most analog sensor now come standard with HART and most analog I/O cards provide a HART interface. HART can be used regardless of the communication protocol used by the Remote I/O subsystem. ProfibusPA must use a linking device to transmit data to/from the sensors as well as 24VDC power. HART uses loop power from the control system analog cards.
Hello I have one question when profibus PA was used input modules of the PLC were removed. So where exactly are they now? Are they in control room near the PLC or in the segment coupler? Or near the sensors?
ProfibusPA is a bus protocol that gathers data from the nodes (sensors) attached to it. There only needs to be a Profibus-DP/PA linking device to join the PLKC to the ProfibusPA segment. There can be many Profibus PA segments attached to one PLC. Each linking device provides the same function as the I/O rack and cards in a traditional installation. The thing I appreciate is that bus networks such as Profibus PA eliminate a lot of I/O panels, saving cost and space.
In the video, you said, 'We move the Inputs & Outputs from Control Room to the field, by this you mean that in this Profibus PA setup, we move the Input/Output Modules/Cards to the field near the sensors...right?
Yes. I can use a variety of devices to connect sensors using Profibus near the location of the sensors, and then connect one cable back to the PLC rack. This saves space, cable, and wiring costs.
@@realpars So you mean in such setup, the Input/Output PLC Modules(Cards) are not present in the PLC Rack in Control Room but are present somewhere in a JB in the field near the concerned sensors, right? Please confirm/clear my ambiguity.
Hi Keith! Great to hear that you have been directed to RealPars! We have a course library filled with over 400+ PLC Programming course videos. Our course library is specifically designed in a way where it provides all the tools needed for beginners to evolve into an advanced level through our hands-on courses. Feel free to have a browse through our course library to see which topics we cover at the moment. bit.ly/30ZrxWq Additionally, we have a free course on PLC Hardware bit.ly/2XnnUrF Hope this helps! If you have any questions, feel free to reach back out over here or at hello@realpars.com
With Profibus PA, you are communicating directly with sensors, valves, etc., and do not require separate I/O cards. Each device has the capability to provide many values for configuration, monitoring, and control.
@@realpars but how does it differentiate between the sensors on a PA bus? Does the sensors have some sort of ID? should we use some different kind of sensors on a PA bus?
2:25 is it that far cheaper? Because, when you placed the I/O module close to sensors, you'll probably need to place it in an electrical board. That electrical board will need a power supply. Incoming from 230VAC, you'll need a 24VDC to supplies the I/O module, breaker, etc. Or how is it done? So i just wondering is it that far cheaper?
Hi there, Thanks for your question! Yes, it is cheaper. The cost of a local control panel next to the sensors is far cheaper than running the wires, conduit, and other electromechanical components. And the real cost is in the labor to do all this work. In addition, when it comes to troubleshooting the sensors, it’s a major advantage to have the I/O boards connected to the sensors where you can see and measure the voltage coming from the sensors to the I/O boards. Imagine having the PLC I/O boards 25 ft or more away from the sensor, and you are trying to troubleshoot a sensor or I/O, and you can’t see the indicator LED signal on the board. Happy learning from RealPars!
Yes and no. Each protocol has a specific way that it interacts with the device they are connected to. ProfibusPA is used mainly for motors, drives, scales, etc., that regularly receive commands (start, stop, tare. etc.). These devices may have setpoints or feedback parameters that are analog in nature (integer values, etc). ProfibusPA is constructed around process transmitter data, with many floating-point values and slower update times (250msec) than typically is used for Profubus DP (50msec updates). The cards used in DP and PA devices are quite different and are constructed to handle the specific interfaces.
Is PROFIBUS and foundation fieldbus network follow same strategy to transfer data from field devices ? What’s the basic difference between them ? By the way kudos to entire team. Never watched a video which is as easy as this to learn about automation and plant control.
Thanks for your support, Pranay! Our technical team is happy to answer any questions related to our course videos. Please, leave those in the comment section of that specific video. Happy learning!
Great question! The process varies depending on the specific programming software you're using. Take, for instance, Omron, Allen Bradley, Siemens, and others. Explaining the intricacies within my response would be quite an information overload. However, I can certainly share that when you're working on programming your network, the software handles the addressing details. To delve deeper, I'd recommend checking out this informative resource on Siemens. It provides an excellent explanation and more in-depth information that might just answer your queries. Here's the link: support.industry.siemens.com/cs/document/22729270/how-do-you-configure-a-profibus-pa-network-in-step-7-?dti=0&lc=en-US Happy learning!
What are the pros and cons of using Profibus PA instead of ASi-bus? In my industry we rarely use PA but ASi is almost standard when it comes to field bus.
Profibus PA is a better choice for connecting analog transmitters, since Profibus PA can transmit larger block of data. Profibus PA installations are more costly than ASi installations on a per device basis. ASi is superb at interfacing digital devices to the PLC or DCS. As with any fieldbus, pick the one that meets your sensor interface needs at the price you are willing to pay. Obviously, once you have an installed base of sensors, it is likely that you will want to continue with that approach. Both Profibus PA and ASi require a master card and compatible interface cards at the device level. ASi has the advantage that the trunk cable does not require a terminator.
what kind of cables do we need between the sensors and the dp I/O and what kinda of cable do we need between the sensors and the Segment Coupler and how many sensors can we connect on a single segment coupler? Thanks
Hi Kholio, Thanks for your comment! This would make for some create new video courses. I will happily pass this on to our course developers for possible future video courses. Thanks for sharing and happy learning!
Buenas tardes, gr por el vídeo, pero este me generó algunas dudas: Que voltajes manejan y que tipo y cantidad de información envía cada uno, los cables son iguales o que diferencia tienen?
Gracias por su pregunta. Primero los cables son diferentes. Debes utilizar un convertidor de DP a PA como mencionamos. Utiliza un cable DP antes de su convertidor y luego, dependiendo de sus dispositivos, debe usar el cable recomendado como se menciona en las especificaciones del convertidor y sus dispositivos, que debe ser un cable común. Puede agregar fibra óptica según sea necesario para sus dispositivos y convertidores adicionales para la fibra óptica. Los vendedores pueden proporcionarle información. Aquí te dejamos un enlace para tu aprendizaje. us.profinet.com/ cuando llegue al enlace, elija su ubicación con su idioma. ¡Feliz aprendizaje de REALPARS!
I a project I have used profibus, Which connected graviometric controller to Profibus remote module via profibus cable & profibus remote module was connected to PLC. I am eager to know what type of Profibus connection that was ? Profibus DP or profibus PA?
Hello, @biplabmukherjee1480. This is a good question. However, as we stated in our video, it is connected to Profibus. Look at the part numbers of the connection devices from your PLC to your remote devices. You have the RS-485 coming from your PLC connection device or PLC direct, and if it is going to your devices directly with no Segment Coupler, as we show, then it is DP. If you have an RS-485 to a Segment Coupler to your devices, then it is DP to PA Profibus. Remember, they are both Profibus. However, there are two types of electronic communication devices.
No, Profibus DP and Ethernet are two very different protocols. You will need a link coupler or Profibus to Profinet converter (both are hardware devices) to connect Profibus DP to Ethernet (Profinet).
Profibus PA has a data transmission rate of 31.25 kbit/s. the speed of a Profibus DP network is selectable at the master to run at speeds between 9.6 kbit/s and 12 Mbit/s. A particular speed should be chosen for a network to give enough time for communication with all the devices present in the network. I find that Profibus DP is most stable at speeds of 500 kbit/s and 1.5 Mbit/s.
@RealPars but how does it differentiate between the sensors on a PA bus? Does the sensors have some sort of ID? should we use some different kind of sensors on a PA bus? Thanks
Each node on a ProfiBus-PA network has a node address (0 - 31). This can be set by DIP switches on the device or via a configuration interface at the device. Only devices with a ProfiBus PA interface can be used in a ProfiBus PA network. If you have a 4-20ma transmitter and want to use it on ProfiBus PA, you will need to change out the electronics on the device. It is not as easy as upgrading from 4-20ma to HART, but ProfiBus PA will give you access to a whole lot more sensor-level data, configuration, and diagnostics than a HART interface can provide.
No I/O modules are required. The ProfiBus PA cable is dropped and connected to each device. Passive junction blocks can be used to make it easy to connect several blocks locally, but these are not I/O modules since they are passive and not active (no configuration or memory).
The answer is yes. All sensors that you want to connect to a Profibus PA segment have to have the Profibus PA interface electronics installed in the sensor, actuator or device. Profibus PA gives you the power to remotely configure, diagnose, maintain, and re-range sensors from the control system. You will need to determine if is it worth the extra cost (not as much as you might think) to be able to maintain and document your instruments remotely. Sensor diagnostics, PV, tag, model and serial number info, alarm info, sensor health, and other variables are all able to be monitored and configured via Profibus PA.
When we removed PROFIBUS-dp and put a unified cable PROFIBUS-pA, how does the PLC know from which sensor this signal is, because all the signals are in one cable?
Profibus PA communicates much the same way as Profibus DP -- via telegrams (data packets). In the header of each data packet is the node number from which the data came. The node numbers are unique on a Profibus PA segment for each device (sensor).
Thank you for all your videos, I have one question on this one, though: Couldn't we have created profibus DP capable sensors instead of creating the Profibus-PA? If not, what's the main limitation?
The way that data is stored and communicated by Profibus PA and Profibus DP is fundamentally different, both in the size and scope of the data transmitted and in the transmission method. Profibus PA is polled and Profibus DP works on a telegram method of data request. Profibus DP is simpler and communication rates can be set over a range of speeds. depending on a number of factors. Profibus PA runs at a fixed speed and is used to communicate more data (transmitter configuration and process data) at regular intervals.
@@realpars Thank you very much, I'll look further into the protocols, then. Your answer was on spot and very efficient. Frankly I wasn't expecting to be answered on a 1 year old video, that was a good surprise, congratulations for your awesome job.
Except cabling efficiency what other benefit profibus PA provides over profibus DP? At what number of devices we should shift from profibus DP to profibus PA. Next, how much is the cost difference between the two setup for a given number of field devices?
Profibus PA allows for a larger array of data to be queried and set in the device as compared to Profibus DP. Profibus PA is used to connect transmitters, actuators, and other analog devices to the network. There is a way to install Profibus PA in an intrinsically safe manner, whereas there is not with Profibus DP. Profibus DP is a faster protocol and is well suited for digital devices like motors.
I would need to know the specific model o the encoder to say exactly, but a blinking red with steady green LED usually indiates the encoder is ready for operation but not activated by the master (e.g. incorrect address configured).
Yes, you are correct that Profibus PA and IO-Link are similar. Both protocols are useful for digital pressure, level, flow, and temperature transmitters. IO-Link is also an excellent choice for discrete I/O, while Profibus PA is not as useful for I/O such as proximity switches. AS-i Bus is primarily used for discrete devices, such as on-off valves and proximity switches since its data capacity per node is not designed for digital transmitter values. Very often, a site will use Profibus PA for transmitters and ASi for discrete I/O.
The MPI/Profibus coupler is usually located in the same place as the master communication cards, which is typically in the control panel with the CPU or network components. This location is usually in an environmentally-controlled operating room or equipment area.
You can make that analogy. For Remote I/O racks that contain I/O cards and are connected to the main CPU through the use of a Profibus communication interface module, the similar system in the Allen-Bradley system would be Remote I/O racks that contain I/O cards and are connected to the main CPU through Ethernet/IP. VFD's can be connected directly to the Profibus DP network (with the proper interface in the VFD) jut like a VFD can be connected to Ethernet/IP (with the proper intreface card).
Thanks for your topic suggestion, Muhammad! Great suggestion. I will happily go ahead and pass this on to our course developers as a possible topic suggestion.
Dear team, Please upload a video on profibus and profinet communication with details on gsd files, profibus configuration tools, configuration database file to be loaded to master controller, communication testing softwares, hardware accessories and demo testing.
You need a Profibus DP master and a 24VDC power supply. Special connectors and Profibus-compliant cable join the master card (a cp-343-2 card in a PCS7 system, for example) to the devices in a daisy-chain fashion. For Profibus DP, usually a DP/PA link coupler is used to allow the Profibus PA segment to look like a DP segment at the PLC. Connections to Profibus PA sensors is usualy done via passive drop blocks and M8 or M12 connectors.
Typically, only 1 ES is needed unless you have a very large plant and require multiple projects to be configured. You still only need 1 ES, but it may be more advantageous to have 2 or more if the plant areas are far apart. The same goes for OS servers. If an OS server goes down, it will take your "operating window" away, so many times, the number of OS servers is set by the scope of the plant operations and the level of reliability required. Redundant OS servers may help reduce the number of overall OS servers required, but it makes the installation a little more complex.
For Profibus DP, the position of I/O cards in remote (and local) racks is defined by the hardware configuration which is downloaded to the CPU. If you remove a card, the hardware configuration will need to be updated. For Profibus PA, each sensor has a unique node address. If you remove a sensor, that node will no longer communicate, but that will not affect any other node. Independent power supplies are used to power Profibus segments, separate from PLC/CPU power.
These are really two different things. The DP/PA coupler brings a Profibus PA segment onto a Profibus DP segment so that to the PLC it looks like one big DP segment and is addressed as such. Separately, you can use ET200M I/O or any other I/O subsystem that has I/O cards to which digital and analog sensors and devices are wired. In the above case, the Profibus DP cable connection on the ET200M communications module (IM151, for example), makes the rack of I/O available to the PLC as a single Profibus node. The addressing is set in the hardware configuration for the individual modules, couplers, and cards.
Profibus PA uses a 1 Pair, AWG 18, Tinned Copper - Stranded cable with a Polyolefin jacket, Foil(s) or Copper Tape(s) shielding, rated for 300V. A reference number is Belden 3076ELS.
Hi Mark, Thanks for your comment! Unfortunately, we no longer support the RealPars App. You can continue watching our video courses on our learning platform.
Hi Bhushan, Thanks for your comment! You are right, we have recently upgraded our learning platform. This optimisation includes the following highly requested features: * Video speed adjustment * Auto-play option * Reviewing your own progress * Free Certificate of Completion for each course * Add trackable course completion certificate to your LinkedIn profile * Organised course structure * Admin options for enterprise accounts to view employee’s progress We are happy to bring you these new improvements which will grant an even better learning experience, as a result we had to decide to no longer support the RealPars App.
Thank you, Lawal! We have the following two subscription packages, which will both grant you full access to our complete course library (400+ video courses): - Monthly subscription package $19.99 a month - Yearly subscription package $119,- ($9.99 a month) billed once You can subscribe through the following link bit.ly/2IpeCp3 Hope to see you joining the RealPars familiy soon! Let us know if you have any questions. Happy learning!
Thanks for awesome video...please make one video on PDM ,how we can configure sensors parameters on simatic manager or already have plz share link.. thanks
Yes, a segment coupler allows a Profibus PA segment to be connected to a Profibus DP segment, which is required to be accessed by the PLC's DP port. Profibus PA is designed to connect directly to the process sensors without the need for a remote I/O rack or interface.
This a similar question to "how far can a car go on one tank of gas". It depends. RS-485 is a current-based protocol, so it can travel a long distance compared with other serial protocols. A general rule is that the maximum length is determined by baud rate, cable type, and host device capabilities. In general, the faster the desired baud rate, the shorter the length of the maximum run of cable before significant signal degradation occurs. For 1Mb rate, the typical maximum distance is around 800 feet (275m).
it's easy to connect a siemens plc or a scalance with profibus, but what about a sensor? how does a sensor connect to profibus? for example a thermocouple probe?
A sensor needs to have a Profibus interface built into the sensor. Typically, for these sensors, this will be Profibus PA. Profibus is a 2-wire system that has special connectors for use with Profibus PA sensors. Usually, an M12 connector is used. A thermocouple probe would not connect directly to Profibus. It would need to be connected to an RTD card in the PLC system or be connected to a transmitter that has a Profibus PA interface.
Profibus DP has had a few versions over the years: V0, V1, and V2. All versions are backward compatible, so as long as the master (the PLC) is at or above the revision of the connected drive, communication should work. Many devices have a selectable Profibus DP version selection that will allow the device to work with CPU's at a previous revision level.
Hi Alexander, Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you. Hope this helps! If I can be of any further assistance, please let me know - I’m more than happy to help! Happy learning!
Really I love Real Pars videos, I learn a lot of automation and I can apply this knowledge in my job as programer in OEM factory. I have a question, if I use Profibus PA do I need Profibus PA sensor/actuator or simply can I use the standard NPN/PNP sensor/actuator? And what is the maximun distsnce between the Profibus PA coupler with the master and with the I/O? Thanks a lot!!
Yes, your sensor has to specified with and have a Profibus PA interface card. The maximum total length of a Profibus PA segment is 1900m, but if it has drops or spurs, they can only be 30m in length each. The spur length must be considered in calculating the total segment length. Practially, I limit the segment lengths to less than 1000m to avoid any potential problems. For installations in hazardous areas, 1000m is the limit but other considerations also have to be made for power. All Profibus cables must be run in isolated, grounded conduit or segmented, grounded cable trays, at least 18 inches from any AC voltage or inductive circuits to avoid electrical interferences.
Great Video guys, I put some really big control systems in about 20 years ago using Omron PLC's with Profibus DP cards links to Profibus PA segment couplers and ASi masters(for digital IO). This was a huge success for us cutting down the control system design and installation massively. I moved on after that and since then have not worked with Profibus. My question is, I am looking at putting forward a control system using Profibus with Rockwell PLC hardware but wonder if its best to use the same conjuration I was using 20 years ago or should we be looking at Profinet? Quite how this changes things I am unsure of .Does instrumentation connect back to the PLC via some kind of gateway and does it power instruments as PA does.
Profinet is more "modern" but ProfiBus DP will work just as well in most cases. Either way, with Rockwell PLC's you will need a gateway. ProSoft has a variety of gateways for every configuration (www.prosoft-technology.com/). I love the PLX31-EIP-SIE Ethernet/IP to Profinet/IE gateway for its speed, reliability and ease of configuration.
This is an excellent video, I went through so many video on internet but could not understand the basic concept behind Profibus DP and Profibus PA . It help me to understand the concept of Profibus and also helped to understand the difference between Profibus PA and Profibus DP.
Hi Sachin,
Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us.
Happy learning!
VERY INFORMATIVE!!
REALPARS always keep it simple,easy to understand and direct to the point
Thanks a lot, Calvince! Amazing to hear.
Amazing explanation within a simple steps rather than many books to have an overview of profibus.
Thanks a lot, Eman!
I'm preparing for my ISA CAP Associate exam and this series of introduction videos are incredibly helpful!
Glad it was helpful! Best of luck with your exam!
Outstanding video. It would be even better if you could add real life examples of explained topics. Nonetheless, the absolute best channel about automation on youtube.
Hi there,
Thanks a lot for your kind compliment and feedback! I will make sure to forward this to our course creators.
Happy learning!
Really Helpful, I learn new things whenever you guys upload a new video. Thanks Guys
Great to hear that, Pavan! Happy learning!
Realpars videos were great in helping me prepare for my interview, and I got the job. Kudos guys.
Q: The cables from the sensors or transmitters to the PA Bus, are they also profibus PA cables?
Great news on your interview! Best of luck in your new job! Yes, Profibus PA cables are used to join individual sensors to the PA bus as well as make up the bus itself. The cable is single pair 18AWG stranded tinned copper, insulated, shielded cable with PVC outer jacket, usually orange in color.
Thanks.its the easiest explanation I've ever watched
Amazing to hear that! Thanks for sharing.
Your videos are really too good and easy to understand. Kindly update a video on "servo valve",about its construction and work.
Hey Akash!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Thanks as always for a simplified and easy to follow as well as understanding.
Question: Does it mean that PA does not use any I/Os?
Profibus PA is used to communicate directly with the device (transmitter, sensor, etc.). The data resides in the device and is transferred to/from the PLC without having to go through a remote I/O subsystem (interface card, analog and digital I/O cards, etc.). This simplifies the cabling and structure for communicating with the field devices.
I'm going through your contents for my interview prep💥. Mahn you guys are amazing. ❤️
Glad to hear that, Adarsh! Best of luck with your interview.
Most of videos are really outstanding... thanks for each and every video
Thanks a lot, Mohammad!
You're simply the best in this field. Great work
That's amazing to hear!
Hi... real pars is doing great job. My doubt is about the protocol and physical cables. Like modubus RTU, TCP/IP, RS 485, 422, foundation fieldbus, profibus, Ethernet, profinet etc.. Among these which one is protocol and which one is physical cable.
Thank you.
RealPars videos are simply amazing.
Very useful content and uncompromising quality. 👏
Thanks a lot🙏
Glad you like them!
Thank you for great videos. I'd like to clarify if those protocols are open or proprietary ones.
Ohh, you made it very easy to comprehend even to a Power engineer like me.🤗.
Thanks, I shall install Realpars App now.
Glad it was helpful!
You can check out our full course library over here learn.realpars.com/ for an even better learning experience
Happy learning!
Very simple...straight to head...thanks
Amazing, Kamal!
One image is equal to the thousands of words.... Excellent visual representation....
Thanks a lot, Raja!
Thanks for the good video, however some comments: When you explain in profibus DP the sensors are connected to the I/O, you should clarify what kind of connection, e.g analog 4-20ma?. When using profibus PA, same type of sensors can be used?
4-20ma transmitters develop an analog signal by varying the current along the wire connected to the analog input card. ProfibusPA is completely different. ProfibusPA and 4-20ma are not compatible. For ProfiBus PA, you will need a different transmitter, cabling, power supply and communication card. ProfiBusPA is a digital communication protocol, not analog like 4-20ma. Each transmitter is considered a node and is configured with software provided by the host controller. ProfibusPA devices can communicate much more data than the single PV variable of analog transmitters, incuding PV, totalizer values, sensor health, and configuration parameters (like range and alarm setpoints),
Brilliant video!! Explained in an easy to understand way and to the point.
Glad you enjoyed it!
Thank you for the video. I have one question. Can u directly connect the sensors to the PA bus? Or Is there any transmitter involved?
Typically a transmitter or other interface electronics is used to connect the sensor/device to the PA bus. You must have a Profibus-PA enabled connection/interface to place a sensor on the Profibus PA segment.
Thanks for the knowledge sharing....
Some questions...Does that means the same software configuration is used in both protocol...?
The sensors or transmitter used are they the normal ones found in the field or they are specially made for this Profibus-PA network (the port that's why I asked)....?
The sensor needs to have the electronics to be able to interface to ProfibusPA. Modern sensors/transmitters are able to be specified with a number of different interface cards installed. If your plant uses ProfibusPA, then the sensors/transmitters need to be purchased with ProfibusPA interface cards. Your sensor electronics need to match your instrument bus type.
ProfibusPA and ProfibusDP have different data packet structures and baud rates for communication. TIA Portal can be used to configure many aspects of each protocol, so although the front-end may look similar, the packets used in communication are not.
@@realpars Wow ...this great guys...this great...Your ever assistance can not be appreciated enough....
Brilliant explanation. I want to know about Profibus-FMS. How the network is configured in the Industrial manufacturing process?
Hey Akber!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Thanks for the explanation.......
I would like to know the advantage and disadvantage of using the Profibus DP and Profibus PA.
Thanks for your comment!
That would make for a great topic suggestion, I will happily forward this to our course developers. Thanks for sharing and happy learning!
So 1 cable to the DP part and 1 cable back? Back and forth on different cables, right?
Thank you for the simple explanation..
I am wondering if the Profibus PA is an replacement of HART protocol and what is the difference between these two protocols.
Yes, HART and ProfibusPA are very similar in the type of data that is provided between the sensor and control system. HART is somewhat simpler, since most analog sensor now come standard with HART and most analog I/O cards provide a HART interface. HART can be used regardless of the communication protocol used by the Remote I/O subsystem. ProfibusPA must use a linking device to transmit data to/from the sensors as well as 24VDC power. HART uses loop power from the control system analog cards.
Hello I have one question
when profibus PA was used input modules of the PLC were removed. So where exactly are they now? Are they in control room near the PLC or in the segment coupler? Or near the sensors?
ProfibusPA is a bus protocol that gathers data from the nodes (sensors) attached to it. There only needs to be a Profibus-DP/PA linking device to join the PLKC to the ProfibusPA segment. There can be many Profibus PA segments attached to one PLC. Each linking device provides the same function as the I/O rack and cards in a traditional installation. The thing I appreciate is that bus networks such as Profibus PA eliminate a lot of I/O panels, saving cost and space.
@@realpars Thank you very much
In the video, you said, 'We move the Inputs & Outputs from Control Room to the field, by this you mean that in this Profibus PA setup, we move the Input/Output Modules/Cards to the field near the sensors...right?
Yes. I can use a variety of devices to connect sensors using Profibus near the location of the sensors, and then connect one cable back to the PLC rack. This saves space, cable, and wiring costs.
@@realpars So you mean in such setup, the Input/Output PLC Modules(Cards) are not present in the PLC Rack in Control Room but are present somewhere in a JB in the field near the concerned sensors, right?
Please confirm/clear my ambiguity.
Really nice explanation. Thank you Realpars
Glad it helped!
Work in a Warehouse (Service Tech) My Controls System Lead sent me to y'all. Where do i start learning about PLC >?
Hi Keith!
Great to hear that you have been directed to RealPars!
We have a course library filled with over 400+ PLC Programming course videos.
Our course library is specifically designed in a way where it provides all the tools needed for beginners to evolve into an advanced level through our hands-on courses.
Feel free to have a browse through our course library to see which topics we cover at the moment. bit.ly/30ZrxWq
Additionally, we have a free course on PLC Hardware bit.ly/2XnnUrF
Hope this helps! If you have any questions, feel free to reach back out over here or at hello@realpars.com
Well explained 😃 cleared my doubts ! We are using FO in place of RS-485.
Glad to hear that!
Thanks for the explanation , it was easy to understand !! . Do we still require IO modules with the PLC in case of Profibus PA
With Profibus PA, you are communicating directly with sensors, valves, etc., and do not require separate I/O cards. Each device has the capability to provide many values for configuration, monitoring, and control.
@@realpars but how does it differentiate between the sensors on a PA bus? Does the sensors have some sort of ID? should we use some different kind of sensors on a PA bus?
Lovely explanation. Thank you so much guys...
Great to hear that! Thanks for sharing.
2:25 is it that far cheaper? Because, when you placed the I/O module close to sensors, you'll probably need to place it in an electrical board. That electrical board will need a power supply. Incoming from 230VAC, you'll need a 24VDC to supplies the I/O module, breaker, etc.
Or how is it done?
So i just wondering is it that far cheaper?
Hi there,
Thanks for your question!
Yes, it is cheaper. The cost of a local control panel next to the sensors is far cheaper than running the wires, conduit, and other electromechanical components. And the real cost is in the labor to do all this work. In addition, when it comes to troubleshooting the sensors, it’s a major advantage to have the I/O boards connected to the sensors where you can see and measure the voltage coming from the sensors to the I/O boards. Imagine having the PLC I/O boards 25 ft or more away from the sensor, and you are trying to troubleshoot a sensor or I/O, and you can’t see the indicator LED signal on the board.
Happy learning from RealPars!
You are wonderful, happy to have access on your training courses.
Glad you like them!
Hello and thank you that was so helpful
my question: can both (rofibus dp and profibus PA) do the analogic sognal process ?
Yes and no. Each protocol has a specific way that it interacts with the device they are connected to. ProfibusPA is used mainly for motors, drives, scales, etc., that regularly receive commands (start, stop, tare. etc.). These devices may have setpoints or feedback parameters that are analog in nature (integer values, etc). ProfibusPA is constructed around process transmitter data, with many floating-point values and slower update times (250msec) than typically is used for Profubus DP (50msec updates). The cards used in DP and PA devices are quite different and are constructed to handle the specific interfaces.
Is PROFIBUS and foundation fieldbus network follow same strategy to transfer data from field devices ? What’s the basic difference between them ? By the way kudos to entire team. Never watched a video which is as easy as this to learn about automation and plant control.
Really impressive video. Cleared my concept. Can you take up a video on different network protocols nd simpify for us?
Glad that you liked it. For the video on different network protocols, we will forward this to our course developers. Thanks for the suggestion!
If we connect all the sensors to Profibus-PA Bus is that means will not require IO Modules or IO Modules can present in PLC Rack. Please clarify.
Thanks for the precious and precise information
Glad it was helpful!
Thanks for the information. I can appreciate the effort to make this video.
That's great to hear, thanks for sharing!
Excellent video. Can you make video on "scalance switches"? Thanks for your excellent video.
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Your videos are extremely helping. Can I get help on ABB 800xA system
Thanks for your support, Pranay!
Our technical team is happy to answer any questions related to our course videos. Please, leave those in the comment section of that specific video.
Happy learning!
how does the communication occur with the segment coupler (in terms of addressing) of the I/O's with the PLC?
Great question!
The process varies depending on the specific programming software you're using. Take, for instance, Omron, Allen Bradley, Siemens, and others. Explaining the intricacies within my response would be quite an information overload. However, I can certainly share that when you're working on programming your network, the software handles the addressing details. To delve deeper, I'd recommend checking out this informative resource on Siemens. It provides an excellent explanation and more in-depth information that might just answer your queries. Here's the link: support.industry.siemens.com/cs/document/22729270/how-do-you-configure-a-profibus-pa-network-in-step-7-?dti=0&lc=en-US
Happy learning!
Thank you very much for your effort....Please arrange the playlist by date
Thank you very much for your support, and for sharing your feedback!
What are the pros and cons of using Profibus PA instead of ASi-bus? In my industry we rarely use PA but ASi is almost standard when it comes to field bus.
Profibus PA is a better choice for connecting analog transmitters, since Profibus PA can transmit larger block of data. Profibus PA installations are more costly than ASi installations on a per device basis. ASi is superb at interfacing digital devices to the PLC or DCS. As with any fieldbus, pick the one that meets your sensor interface needs at the price you are willing to pay. Obviously, once you have an installed base of sensors, it is likely that you will want to continue with that approach. Both Profibus PA and ASi require a master card and compatible interface cards at the device level. ASi has the advantage that the trunk cable does not require a terminator.
what kind of cables do we need between the sensors and the dp I/O and what kinda of cable do we need between the sensors and the Segment Coupler and how many sensors can we connect on a single segment coupler?
Thanks
Hi Kholio,
Thanks for your comment!
This would make for some create new video courses. I will happily pass this on to our course developers for possible future video courses.
Thanks for sharing and happy learning!
@@realpars Thank you i am looking forward for the new content and happy teaching! :D
Buenas tardes, gr por el vídeo, pero este me generó algunas dudas:
Que voltajes manejan y que tipo y cantidad de información envía cada uno, los cables son iguales o que diferencia tienen?
Gracias por su pregunta. Primero los cables son diferentes. Debes utilizar un convertidor de DP a PA como mencionamos. Utiliza un cable DP antes de su convertidor y luego, dependiendo de sus dispositivos, debe usar el cable recomendado como se menciona en las especificaciones del convertidor y sus dispositivos, que debe ser un cable común. Puede agregar fibra óptica según sea necesario para sus dispositivos y convertidores adicionales para la fibra óptica. Los vendedores pueden proporcionarle información.
Aquí te dejamos un enlace para tu aprendizaje. us.profinet.com/ cuando llegue al enlace, elija su ubicación con su idioma. ¡Feliz aprendizaje de REALPARS!
Thank you for the professional video.
Is there a difference between profibus PA and profinet?
I a project I have used profibus, Which connected graviometric controller to Profibus remote module via profibus cable & profibus remote module was connected to PLC. I am eager to know what type of Profibus connection that was ? Profibus DP or profibus PA?
Hello, @biplabmukherjee1480. This is a good question. However, as we stated in our video, it is connected to Profibus. Look at the part numbers of the connection devices from your PLC to your remote devices. You have the RS-485 coming from your PLC connection device or PLC direct, and if it is going to your devices directly with no Segment Coupler, as we show, then it is DP. If you have an RS-485 to a Segment Coupler to your devices, then it is DP to PA Profibus. Remember, they are both Profibus. However, there are two types of electronic communication devices.
if I/O modules are removed too how the sensors data will go to I/O modules.
very useful channel for knowledge developing!
Great to hear that! Thanks for sharing.
Instead of connected RS485 can we connect with ethernet cable directly to DCS system from IO in case of Profibus-DP?
No, Profibus DP and Ethernet are two very different protocols. You will need a link coupler or Profibus to Profinet converter (both are hardware devices) to connect Profibus DP to Ethernet (Profinet).
Can you tell about the what's the speed of perfect DP and Pa
Profibus PA has a data transmission rate of 31.25 kbit/s. the speed of a Profibus DP network is selectable at the master to run at speeds between 9.6 kbit/s and 12 Mbit/s. A particular speed should be chosen for a network to give enough time for communication with all the devices present in the network. I find that Profibus DP is most stable at speeds of 500 kbit/s and 1.5 Mbit/s.
@RealPars but how does it differentiate between the sensors on a PA bus? Does the sensors have some sort of ID? should we use some different kind of sensors on a PA bus?
Thanks
Each node on a ProfiBus-PA network has a node address (0 - 31). This can be set by DIP switches on the device or via a configuration interface at the device. Only devices with a ProfiBus PA interface can be used in a ProfiBus PA network. If you have a 4-20ma transmitter and want to use it on ProfiBus PA, you will need to change out the electronics on the device. It is not as easy as upgrading from 4-20ma to HART, but ProfiBus PA will give you access to a whole lot more sensor-level data, configuration, and diagnostics than a HART interface can provide.
@@realpars THANKS A LOT FOR THE INFO.
Do we need I/O module with Profibus PA?
No I/O modules are required. The ProfiBus PA cable is dropped and connected to each device. Passive junction blocks can be used to make it easy to connect several blocks locally, but these are not I/O modules since they are passive and not active (no configuration or memory).
Does the sensors have to be replaced with Profibus-PA compatible sensors? Or do you need additional converters for each sensor?
Very brief explanation& very informative.
The answer is yes. All sensors that you want to connect to a Profibus PA segment have to have the Profibus PA interface electronics installed in the sensor, actuator or device. Profibus PA gives you the power to remotely configure, diagnose, maintain, and re-range sensors from the control system. You will need to determine if is it worth the extra cost (not as much as you might think) to be able to maintain and document your instruments remotely. Sensor diagnostics, PV, tag, model and serial number info, alarm info, sensor health, and other variables are all able to be monitored and configured via Profibus PA.
When we removed PROFIBUS-dp and put a unified cable PROFIBUS-pA, how does the PLC know from which sensor this signal is, because all the signals are in one cable?
Profibus PA communicates much the same way as Profibus DP -- via telegrams (data packets). In the header of each data packet is the node number from which the data came. The node numbers are unique on a Profibus PA segment for each device (sensor).
Thank you for all your videos, I have one question on this one, though:
Couldn't we have created profibus DP capable sensors instead of creating the Profibus-PA? If not, what's the main limitation?
The way that data is stored and communicated by Profibus PA and Profibus DP is fundamentally different, both in the size and scope of the data transmitted and in the transmission method. Profibus PA is polled and Profibus DP works on a telegram method of data request. Profibus DP is simpler and communication rates can be set over a range of speeds. depending on a number of factors. Profibus PA runs at a fixed speed and is used to communicate more data (transmitter configuration and process data) at regular intervals.
@@realpars Thank you very much, I'll look further into the protocols, then. Your answer was on spot and very efficient.
Frankly I wasn't expecting to be answered on a 1 year old video, that was a good surprise, congratulations for your awesome job.
Except cabling efficiency what other benefit profibus PA provides over profibus DP? At what number of devices we should shift from profibus DP to profibus PA. Next, how much is the cost difference between the two setup for a given number of field devices?
Profibus PA allows for a larger array of data to be queried and set in the device as compared to Profibus DP. Profibus PA is used to connect transmitters, actuators, and other analog devices to the network. There is a way to install Profibus PA in an intrinsically safe manner, whereas there is not with Profibus DP. Profibus DP is a faster protocol and is well suited for digital devices like motors.
How about the différence in implementing OSI model layers in profibus DP and profibus PA
Hello, @sofianetidjani. Thank you for your question. Here is a link to help you learn on these topics: us.profinet.com/ Happy learning✨
Sir,
What are the causes if profibus encoder red indication blinking and green on permanently ?
I would need to know the specific model o the encoder to say exactly, but a blinking red with steady green LED usually indiates the encoder is ready for operation but not activated by the
master (e.g. incorrect address configured).
Nice 👍 explanation,
Please make a video on MBP
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Very good knowledge 👍
Thank you, Sandesh!
PA seems to be more in the level of IO-LINK or AS-Interface. But when to use one or the other?
Yes, you are correct that Profibus PA and IO-Link are similar. Both protocols are useful for digital pressure, level, flow, and temperature transmitters. IO-Link is also an excellent choice for discrete I/O, while Profibus PA is not as useful for I/O such as proximity switches. AS-i Bus is primarily used for discrete devices, such as on-off valves and proximity switches since its data capacity per node is not designed for digital transmitter values. Very often, a site will use Profibus PA for transmitters and ASi for discrete I/O.
coupler is in control room or factory floor?
The MPI/Profibus coupler is usually located in the same place as the master communication cards, which is typically in the control panel with the CPU or network components. This location is usually in an environmentally-controlled operating room or equipment area.
@@realpars Is placing a coupler in a factory floor a mistake? Is it acceptable?
Would it be correct to say that Profibus DP is the equivalent of Remote I/O racks in an Allen Bradley controls system?
You can make that analogy. For Remote I/O racks that contain I/O cards and are connected to the main CPU through the use of a Profibus communication interface module, the similar system in the Allen-Bradley system would be Remote I/O racks that contain I/O cards and are connected to the main CPU through Ethernet/IP. VFD's can be connected directly to the Profibus DP network (with the proper interface in the VFD) jut like a VFD can be connected to Ethernet/IP (with the proper intreface card).
Please add a video on actual look of profibus DP and PA with coupler segment
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Please upload vedio on DP-DP or DP-PA coupler and Interface module work
Hey Deewan!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Thanks a lot .
Excellent Effort! Could You Please make a video for Complete Troubleshooting guide for S7 400 PLC
Thanks for your topic suggestion, Muhammad! Great suggestion. I will happily go ahead and pass this on to our course developers as a possible topic suggestion.
Dear team,
Please upload a video on profibus and profinet communication with details on gsd files, profibus configuration tools, configuration database file to be loaded to master controller, communication testing softwares, hardware accessories and demo testing.
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
How do we interface field instruments on a DCS using Profibus protocol. What hardware is required?
You need a Profibus DP master and a 24VDC power supply. Special connectors and Profibus-compliant cable join the master card (a cp-343-2 card in a PCS7 system, for example) to the devices in a daisy-chain fashion. For Profibus DP, usually a DP/PA link coupler is used to allow the Profibus PA segment to look like a DP segment at the PLC. Connections to Profibus PA sensors is usualy done via passive drop blocks and M8 or M12 connectors.
Awesome clip. Thank you
Thank you, Kelton!
Sorry for an irrelevant question, based on what we decide how many os servers or es servers should we take for a single process?
Typically, only 1 ES is needed unless you have a very large plant and require multiple projects to be configured. You still only need 1 ES, but it may be more advantageous to have 2 or more if the plant areas are far apart. The same goes for OS servers. If an OS server goes down, it will take your "operating window" away, so many times, the number of OS servers is set by the scope of the plant operations and the level of reliability required. Redundant OS servers may help reduce the number of overall OS servers required, but it makes the installation a little more complex.
Could you make a video about valves and positioner ?
Hey Emil,
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
If we remove I/O modules then how plc will know, which I/O device has sent the signal, and how you will provide isolation between cpu and supply??
For Profibus DP, the position of I/O cards in remote (and local) racks is defined by the hardware configuration which is downloaded to the CPU. If you remove a card, the hardware configuration will need to be updated. For Profibus PA, each sensor has a unique node address. If you remove a sensor, that node will no longer communicate, but that will not affect any other node. Independent power supplies are used to power Profibus segments, separate from PLC/CPU power.
@@realpars Thank you so much brother
Please upload a detailed video about profibus
great value astonishing work thanks
Amazing compliment! Thanks for sharing!
If we are using DP/PA Coupler..Is Input /Output Module Can be used or not??
These are really two different things. The DP/PA coupler brings a Profibus PA segment onto a Profibus DP segment so that to the PLC it looks like one big DP segment and is addressed as such. Separately, you can use ET200M I/O or any other I/O subsystem that has I/O cards to which digital and analog sensors and devices are wired. In the above case, the Profibus DP cable connection on the ET200M communications module (IM151, for example), makes the rack of I/O available to the PLC as a single Profibus node. The addressing is set in the hardware configuration for the individual modules, couplers, and cards.
Nice video!!! Great job!!!
Thanks a lot!
Impressive and excellent channel. all the support to your efforts guys.
how do you feed power to the sensor is it through PA or separate line
Thanks a lot, Abdullah!
Excellent explaination thank you sir
You are welcome! Happy learning
Always the best👍
Thank you!
What is the cable used for Profibus PA?
Profibus PA uses a 1 Pair, AWG 18, Tinned Copper - Stranded cable with a Polyolefin jacket, Foil(s) or Copper Tape(s) shielding, rated for 300V. A reference number is Belden 3076ELS.
I don't see the Realpars App on iOS. Was it removed?
Hi Mark,
Thanks for your comment! Unfortunately, we no longer support the RealPars App. You can continue watching our video courses on our learning platform.
Hi team, very informative videos . The app is not available in India iOS appstore :(
Hi Bhushan,
Thanks for your comment!
You are right, we have recently upgraded our learning platform. This optimisation includes the following highly requested features:
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We are happy to bring you these new improvements which will grant an even better learning experience, as a result we had to decide to no longer support the RealPars App.
Please make video on what is protocols and types of protocol used in plc.
Thanks for your suggestion, Jay! Happy learning
Nive video.
How much does it cost to subscribe as a member on the Android App?
Thank you, Lawal!
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Thanks for awesome video...please make one video on PDM ,how we can configure sensors parameters on simatic manager or already have plz share link.. thanks
Hey Akhtar!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Thanks for kind responding
Profibus DP/PA the same as AFD?
Thank you.
Very interesting video & application
Great to hear that! Thank you.
i have one query. in PA we have connected segment coupler.. but to connect to i/o
Yes, a segment coupler allows a Profibus PA segment to be connected to a Profibus DP segment, which is required to be accessed by the PLC's DP port. Profibus PA is designed to connect directly to the process sensors without the need for a remote I/O rack or interface.
Also I have a question about the maximum distance for RS485?
This a similar question to "how far can a car go on one tank of gas". It depends. RS-485 is a current-based protocol, so it can travel a long distance compared with other serial protocols. A general rule is that the maximum length is determined by baud rate, cable type, and host device capabilities. In general, the faster the desired baud rate, the shorter the length of the maximum run of cable before significant signal degradation occurs. For 1Mb rate, the typical maximum distance is around 800 feet (275m).
@@realpars Thanks so much for your reply
it's easy to connect a siemens plc or a scalance with profibus, but what about a sensor? how does a sensor connect to profibus? for example a thermocouple probe?
A sensor needs to have a Profibus interface built into the sensor. Typically, for these sensors, this will be Profibus PA. Profibus is a 2-wire system that has special connectors for use with Profibus PA sensors. Usually, an M12 connector is used. A thermocouple probe would not connect directly to Profibus. It would need to be connected to an RTD card in the PLC system or be connected to a transmitter that has a Profibus PA interface.
Does ti505 siemens old models can still connect with new models of profibus dp drives
Profibus DP has had a few versions over the years: V0, V1, and V2. All versions are backward compatible, so as long as the master (the PLC) is at or above the revision of the connected drive, communication should work. Many devices have a selectable Profibus DP version selection that will allow the device to work with CPU's at a previous revision level.
Dear.
Do they have courses in Spanish or subtitled?
Cheers
Hi Alexander,
Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you.
Hope this helps! If I can be of any further assistance, please let me know - I’m more than happy to help!
Happy learning!
Really I love Real Pars videos, I learn a lot of automation and I can apply this knowledge in my job as programer in OEM factory.
I have a question, if I use Profibus PA do I need Profibus PA sensor/actuator or simply can I use the standard NPN/PNP sensor/actuator? And what is the maximun distsnce between the Profibus PA coupler with the master and with the I/O? Thanks a lot!!
Yes, your sensor has to specified with and have a Profibus PA interface card. The maximum total length of a Profibus PA segment is 1900m, but if it has drops or spurs, they can only be 30m in length each. The spur length must be considered in calculating the total segment length. Practially, I limit the segment lengths to less than 1000m to avoid any potential problems. For installations in hazardous areas, 1000m is the limit but other considerations also have to be made for power. All Profibus cables must be run in isolated, grounded conduit or segmented, grounded cable trays, at least 18 inches from any AC voltage or inductive circuits to avoid electrical interferences.
@@realpars Thank you for this information, I had the same doubt. Regards.
Thanks for the information ...
You are very welcome!
Easily Understood. Thanks.
Glad it helped!
Great Video guys, I put some really big control systems in about 20 years ago using Omron PLC's with Profibus DP cards links to Profibus PA segment couplers and ASi masters(for digital IO). This was a huge success for us cutting down the control system design and installation massively. I moved on after that and since then have not worked with Profibus.
My question is, I am looking at putting forward a control system using Profibus with Rockwell PLC hardware but wonder if its best to use the same conjuration I was using 20 years ago or should we be looking at Profinet? Quite how this changes things I am unsure of .Does instrumentation connect back to the PLC via some kind of gateway and does it power instruments as PA does.
Profinet is more "modern" but ProfiBus DP will work just as well in most cases. Either way, with Rockwell PLC's you will need a gateway. ProSoft has a variety of gateways for every configuration (www.prosoft-technology.com/). I love the PLX31-EIP-SIE Ethernet/IP to Profinet/IE gateway for its speed, reliability and ease of configuration.