Micro820 and PowerMonitor1000 Communication

[mattzene]

Hi,

I'm wondering if anyone knows whether it is possible to communicate between a Micro820 w/ a 2080-SERIALISOL and a PowerMonitor1000 via Modbus RTU. The PowerMonitor documentation states under the Explicit Messaging that "The power monitor supports PLC-5 Typed, SLC Typed, and CIP Generic message requests."

When trying to read the holding registers in CCW, I'm getting error 55 (The message timed out in the local processor. A link layer timeout) on my MSG_MODBUS block. I can see the RX light flash on the PowerMonitor each time the PLC sends a message, but the TX light does not flash. It seems that it doesn't support the type of message CCW uses, but considering Modbus is a standard communication protocol, I don't understand why they wouldn't be compatible.

Here is a link to the documentation if needed, the explicit messaging section is on page 86: https://literature.rockwellautomation.com/idc/groups/literature/documents/um/1408-um002_-en-p.pdf

 

[5618]

Explicit messaging is Ethernet stuff that sounds like you’re not using. Just before that in the manual is a little about Modbus RTU serial. Check the RS-485 setup in the PM1000 and check the MSG_MODBUS parameters. I find the Micro800 MSG blocks to be a bit non-intuitive. If I have something wrong there, it’s usually in the TargetCfg parameters.

Edit: in your PM1000 RS485 setup, protocol should be Modbus RTU slave. Make sure the comm settings match the SERIALISOL and the address matches the MSG TargetCfg.

 

[mattzene]

5618- I looked through the settings on the PowerMonitor and found the protocol was set to full-duplex DF1, I set it to modbus and the PowerMonitor is now responding to my messages.
Thanks!