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Can anyone help me with communication of RS-485 communication between 2 Fatek PLC's (FBs-20MCT2-AC) via communication module FBs-CM55.?

I am declaring one Fatek PLC as Master and other as slave but the data is not transmitted between them, i can't understand the data address declared of slave as〜, i am stuck here, can anyone help me out.

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Question added by Muhammad Raza Khalid , industrial automation engineer , Naveena Denim
Date Posted: 2019/06/27
azzaz ezzat
by azzaz ezzat , Maintenance Manager , Nestle Egypt Dry Goods Factory

make sure you have the exact Boud rate ,even /odd parity on both Master and slave  then make sure of Polarity Data+& Data -

if it is not working try to test evey PLC alone with your computer and RS-485 cable to check what is the problem or if you have HMI use it to read the internal register with each one of them  

Sudhir Kumar
by Sudhir Kumar , Assistant Engineering Manager , Larsen & Toubro Construction

Configure the communication parameters (Baud Rate, Parity, Stop Bits) first, check Data (+) & Data (-) cables termination, Device ID (address) to be provided for Slave. 

If everything was good, check with Modscan software first, if u are able to read the register values.

Khalid  Imtiaz
by Khalid Imtiaz , Design & Application Engineer , Intech Automation & Intelligence

Swap the data + and data - cables check baudrate parity and other parameters.

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