Dear Experts,

I use CPU314 and CP341 for MODBUS SLAVE communication using RS485 interface.

Now I have problem with My CP341 Module SF red light all the time.

When I checked the Module Diagnostic buffer and not found the message.

I attach screenshots of HW configuration

Please kindly let me know what should be the problem for this fault issue.

Thank you

Hello,

sry, not enough infos. What exactly MB protocol is set on CP, depended dongle inserted/checked? What exactly things do you made till this time with project, only HW cfg?