Siemens S7-1200 PLCs
For a few of the machines on my network, I wish to be able to monitor a “heartbeat” signal and then send this to a supervisory PLC.
I already have OPC tags setup for a 1Hz bit on each of the machines to be monitored.These tags are monitored on a “fast” scan. My plan was to setup a series of OPC tags in the supervisory PLC and have ignition copy the data between the OPC tags.
I’ve just rigged up a test with an expression tag copying data between the OPC tags. This seems like a lot of work. Can anyone suggest a more elegant solution please?
Note (AFAIK) the S7-1200 PLC has no OPC client functionality. I could of course set up a direct communication path between the PLCs in question. The Siemens GET/PUT works great for this. However, I was hoping to do it all in ignition!
Thanks for looking