Reading data from Siemens Data block

[Jacek_P]

Hello,

I am looking for information about Read_var block.

Using M340 NOC0401 I would like to read Siemens 1200/1500 controller.

data is located in Data block (DB).

Is read_var able to read data from DB ?

Regards

[maidamar · Accepted solution]

It's not, sorry. Siemens uses S7 communication, which is a communication protocol specific for their system.

The preferred way of communication between Schneider and Siemens would ask the Siemens PLC engineer to set up a Modbus TCP server and expose the DB information on a Modbus map. Then you would use READ_VAR to read from that.

[Jacek_P]

Thx.

Regards