ABB PLC (07 KT 97)

Hello,

We are using a ABB 07 KT 97 PLC in a sewage treatment plant. We connected a CP555 HMI with PLC using MODBUS communication with COM1 port. I have assigned the PLC as a standalone, and both are working. But the client needs to connect all field PLCs into a single network. But I failed to connect my PC with PLC using Com2 port, com2 is not at all responding to any type of communication.

How can I activate the com2 port?

I have now assigned my PLC as a master, and HMI is slave, while it connecting to the central network do I need to change its status, as there will be another master in the main network?

Can anyone help me?
shafeekh @ pnc-ae. com

I think you have to check ABB manuals because you have to follow some directions for setup same time both serial ports as Modbus.

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