Hello,

I would like to write a value inside a device connected to a logo via the MODBUS protocol. I have configured the connection (see image) I need to know how to proceed and what operations I need to use to write the data. The address on the device is 4000.

Thanks,

Luca

Hello,

Excuse me. when I sent the post the site gave me an error. I've seen now that there are three.

Hello,

The correct address is 10000

How do I find out the device ID?

which operators should I use to write the value to the device?

Thanks

Hi,

according the corrected HR (10001) you have to write the value in LOGO! into VW100. In most cases it is an analog value from a LOGO! analogue function block.

To get this value into VW100 in LOGO! you have to use VM-Memory mapping, select the function block number and the right parameter of this FB.

Here an example how to get an analog value transfered from LOGO! (Modbus TCP client) to a modbus device (Modbus TCP Server)

Configuration in LOGO!:

Configuration of Modbus in LOGO!:

Hope this helps