What to check if your RS485 is not communicating | Pulsar Controllers

If you're using a Pulsar Measurement Controller with RS485 communications, Modbus or Profibus DP, and can't receive signals, then you can check that the RS485 hardware is functioning correctly. This video provides a walkthrough of how to check your settings and then use a Digital Volt Meter (DVM) for further fault finding if needed.
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Pulsar Process Measurement Ltd manufactures and supplies level, volume, open channel flow, pipe flow, sludge interface measurement and pump control instrumentation.
Since 1997, Pulsar has risen to become one of the world-leading non-contacting measurement instrumentation manufacturers and their products are used in a wide variety of industries and applications worldwide.
Pulsar’s award-winning products are favoured worldwide due to their reliability and easy menu-driven set-up. Pulsar’s product range has been designed to provide a full range of alternatives, from single point of measurement installations right through to complex multi-point applications with digital communications.

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Before installing how to check , whether rs485 is working or not

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Raspberry Pi RS485 and CAN Module: th-cam.com/video/nAYsmBIwneQ/w-d-xo.html