Part -3 | Controlling Water Level in the PLC Ladder Logic Program | Basics of PLC Ladder Diagram

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The language itself can be seen as a set of connections between logical checkers (contacts) and actuators (coils). If a path can be traced between the left side of the rung and the output, through asserted (true or "closed") contacts, the rung is true and the output coil storage bit is asserted (1) or true. If no path can be traced, then the output is false (0) and the "coil" by analogy to electromechanical relays is considered "de-energized". The analogy between logical propositions and relay contact status is due to Claude Shannon.
Ladder logic has contacts that make or break circuits to control coils. Each coil or contact corresponds to the status of a single bit in the programmable controller's memory. Unlike electromechanical relays, a ladder program can refer any number of times to the status of a single bit, equivalent to a relay with an indefinitely large number of contacts.
So-called "contacts" may refer to physical ("hard") inputs to the programmable controller from physical devices such as pushbuttons and limit switches via an integrated or external input module, or may represent the status of internal storage bits which may be generated elsewhere in the program.
Each rung of ladder language typically has one coil at the far right. Some manufacturers may allow more than one output coil on a rung.
Rung input : checkers (contacts)
-[ ]- Normally open contact, closed whenever its corresponding coil or an input which controls it is energized. (Open contact at rest)
-[\]- Normally closed ("not") contact, closed whenever its corresponding coil or an input which controls it is not energized. (Closed contact at rest)
Rung output: actuators (coils)
-( )- Normally inactive coil, energized whenever its rung is closed. (Inactive at rest)
-(\)- Normally active ("not") coil, energized whenever its rung is open. (Active at rest)
The "coil" (output of a rung) may represent a physical output which operates some device connected to the programmable controller, or may represent an internal storage bit for use elsewhere in the program.
A way to recall these is to imagine the checkers (contacts) as a push button input, and the actuators (coils) as a light bulb output. The presence of a slash within the checkers or actuators would indicate the default state of the device at rest.
Logical AND

[@animeaether45]

An electrical motor is used for filling of water tank along with two sensors to maintain water level in the tank. Draw the ladder logic diagram in such a way that tank should not be overflow and should not be empty..
Sir , ye problem solve kaise kare

[@ElectricalAndautomation_guru]

Ok

[@bairiganjansahoo5589]

Plz make it by functional block diagrams

[@ElectricalAndautomation_guru]

OK, I WILL TRY TO COVER IT BY FBD

[@xyzfacts8170]

sir samajh main tho aa gya
pr yeah last bala 3 rung samjh main nahi aya ki aapne bola jese hi meri water supply low level switch se niche aa jayegi tho jo thrid run hai bho auto main tho tha hi tho bho No se Nc baan gya or jo low level switch the iski power high ho gai tho yeah nc ho gya sir yeah NC tho pehle se hi tha tho yeah no nahi ho jayega ki yeah ek fix normal closed hai jo nc main hi perment hai
thoda yeah bata do mera sab clear ho gaya hai

[@ElectricalAndautomation_guru]

Ok

[@automationguruji1399]

Addressing deke ke batao sir

[@ElectricalAndautomation_guru]

What address?

[@saudi_info785]

Bhai awaz to nikalo

[@ElectricalAndautomation_guru]

Volume bada lo

[@laxmisom3030]

Sir aapne samjhana to chaha h but apka video sahi nhi bna h noise bhot jyada h

[@ElectricalAndautomation_guru]

Okay

[@rajanbhatt5633]

Smaj me nahi aaya! 🧐

[@ElectricalAndautomation_guru]

Kya samjh nahi aa raha!

[@rajanbhatt5633]

Video fast he.
Or example too complex for me.
Leatching and unleatching ko base se smjao.
NO or NC bhut he, usme confusion he!

[@ElectricalAndautomation_guru]

Ok.