How to connect to 500PLCs?
I have 4 PM573-Eth.
I want to communicate (connect) each other on Ethenet+Fiber or Modbus+Fiber (3 km distance between each other) such a way that one of my PLC work as a master and other all as slave.
in other word I want to collect my data form all 3 plc to one PLC.
Can anyone tell me how can I do this?
As pointed in previous post, the easiest way is ModBus TCP/IP, but....
There is important to define how much signals will be exchanged via this channel. Communication port/channel directly on CPU is also used for visualization (in case of any application layer or panel) and CPU configuration (changes, upload configuration). In case of huge traffic between CPUs you can run into troubles regarding this side. There is possible to use additional CM577 communication module for visualization/configuration side (own coprocessor) which also decrease CPU loading....