Hello Folks,

I need to create a communication between a LOGO! and a cim, in order to offer the possibility to a customer to access to the logo I/O state (digital and analog) via a rs845 RTU modbus . So to start, i try to access it by modbus/tcp, and later i will configure it in RS485.

So i use on my computer modbus doctor as client.

My problem is that i'm unable to acces to the data. I'm able to connect with modbus doctor ti the CIM module, but most of time , i get a time out as response.

When i launch the connection on modbus doctor, it appears in the cim module.

I add some screen captures of my configuration.

Each time i have a time_out, the client apears to be disconnect in the cim.

Hi PREV073,

I don't know if this example application below can help you. Check all the data transfer and communication settings.

LOGO! CIM - Comunicación Modbus RTU con SINAMICS V20