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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.

PLC Research Communication Development Communication Skills PLC SCADA
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تم إضافة السؤال من قبل Muhammad Raza Khalid , industrial automation engineer , Naveena Denim
تاريخ النشر: 2019/06/27
التصويت كمفيد (0) المشاهدات (6) المتابعون (5) الإجابات (4) بلّغ عن السؤال
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azzaz ezzat
من قبل 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
من قبل 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
من قبل Khalid Imtiaz , Design & Application Engineer , Intech Automation & Intelligence

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

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