I tried to define the maximum bandwidth generate by a PLC using Modbus/TCP.
I have an OPC server (OFS server) which ask my PLC (SCHNEIDER Quantum) in Modbus/TCP.
Somebody can help me?
Thank you very much
There are several discussions of Modbus throughput calculation considerations on control.com:
http://www.control.com/thread/956864156 "RS-485 Timing Considerations"
http://www.control.com/thread/1397486168 "Modbus Data Transmission Time"
Or NWBoson's rule-of-thumb of 1 second:
but I don't recall a discussion of OPC server throughput calculations.
I'm stumped. I don't know how much overhead an OPC server requires.
Run a test?