Momentum M1 plus option adaptor (MODBUS+)

[jonathanwhelan 0]

Hi, First time posting. I hope in time I can contribute something back to the forum but as of now my PLC knowledge is quite limited. I'm upgrading a system that was installed in 2002. Currently its connected to an HMI computer but I need to connect it to the plant's SCADA system (OSI's Monarch). The system itself has 5 slaves (M1 171CCS70000) and a master (171CCC98020). These six PLCs were installed with the Momentum option adapters (172PNN21022) and use MODBUS PLUS to communicate. The problem with this is that Monarch, AFAIK, can't communicate with MODBUS PLUS, just vanilla MODBUS. There's an RJ45 ethernet jack on the master that is connected to the HMI computer. My question is: Can I use this to talk MODBUS TCP to the SCADA? The manuals list this as a MODBUS port but I don't know what effect the option adapter could have on its communication. Thanks for the help. Ask if anything needs to be clarified. Jon

[Crossbow 297]

Be careful and check the specs on the CPU. The Momentum uses RJ45 plugs for RS232 and Ethernet. Obviously they are not interchangeable.

[jonathanwhelan 0]

Thanks for the advice. I checked the specs, the highlighted one being what I have: So I have an available RJ45 jack for the ethernet connection. But is this ethernet jack affected by the fact that this particular processor is sitting in the 172 PNN 210 22 MODBUS PLUS option adapter? Can I still send out MODBUS with the RJ45 with the processor in this adapter?

[jonathanwhelan 0]

Bump for help!

[Crossbow 297]

The option adapter has no effect on the built in ports. So the RS485 should still work fine.