How we can transfer the data between PM851 with CP610 using RS485 protocol?
We tried to communicate PM851 with CP610 via RS485 protocol.
MODBUS Read and Write instruction not working.
What is the format for addressing , we have to use in CP610 for any data transfer with PM851?
I did such connection and it is working with the following comments:
COM3 of PM851 is RS232 port, so I used that connection to CP6xx (otherwise you have to use RS232 to RS485 transmitter).
Also, as general, PM851 should be master in this connection. Used standard Modbus settings for COM3 - 9600,none,8,1,none,0. For Modbus protocol select Master,1,Poll time=0. In the application used MBConnect, MBRead and MBWrite.
For start address used %MW10#1
Then in CP6xx used Modbus RTU Server (that is a slave protocol) with Modbus ID=2 and:
For the tag MW%10#1 configured the following tag: