Communicate PPI error between S7-200 and T7A

[ilovebeijer]

Hello,
When I communicated between T7A and S7-200 CPU 214, I have a error: "bab reply from station 2". Please hepl me. I use PPI cable: 485 Cable TxA / TxB
1----3
6----8
5----2

Have any other cable connect T7A and S7-200 CPU-214?

Thank you so much!

[JohnCZ]

What Baudrate PLC and PANEL PPI address do you use ??
Becouse it's must be set correctly.

We have had the same problem, but we solved it by setting the correct communication.

Jan

[ilovebeijer]

What are the Baudrate and the Panel PPI address I should use?
Thank you!

[mark.monroe]

The baud rate and PPL address is defined by what you have set on the PLC. We can not tell you what it should be.

Another common problem is that people have the wrong COM port set on the HMI. Take a look at the below picture and make sure you have the driver set to use either COM2 or COM4, depending on which physical port you are using.

Snap 2013-03-07 at 08.09.28.jpg (58.46 KiB) Viewed 14629 times

[JohnCZ]

Our Setting

The PPI baud rate is 19200 it can be set higer.

PLC PPI 2
Panel PPI 1

We don't know why but sometimes it's not work with higer then PLC PPI address

COM4 becouse you need Check signals from RS485.

And you must have a good cable.

[ilovebeijer]

Thank you so much!
I have resolved my problem.