Modbus TCP

[Dinko]

                   Dear Colleagues,

In my project I'm using Vision V350-TU24 PLC. I have connected the PLC to SCADA software and I can read and write data from and to the PLC via MODBUS TCP protocol.  In this case the PLC is slave. The question is- Can I connect to the same ethernet network power meter SATEC PM130. Can the PLC read data from the power meter and after that to send the data to the SCADA software? Can the PLC be simultaneously master and slave? Below in the attachment I send you my test program. I can read and write data from SCADA software and Remote operator.

MODBUS_IP.vlp

[Joe Tauser]

A Vision PLC can be both a TCP Master and a TCP slave.  You have to declare them separately (two IP Config blocks) and assign each one its own socket and port number.

I usually use port 502 for the slave and 503 for the master.

Joe T.

[Flex727]

And just to expand on Joe's answer, Your PLC has 4 available sockets for Ethernet communications. Each socket can have its own configuration independent of the others. You can have any mix of protocols, master/slave, and port numbers desired, just don't duplicate port numbers. Be aware that each socket has a default configuration even if you don't specifically define one.

[Dinko]

Dear Colleagues,

Thanks a lot for your advices. I will check it and will give you a feedback about the result.

I wish you all the best.