Hi everyone,

We are getting Faults LED blinking in SIMATIC ET200M paired with SIMATIC FIELD DEVICE COUPLER (i have added attachment the image of devices).

ET200M is communicating with SIMATIC S7-1500 PLC CPU 1517-3 PN/DP using PROFIBUS DP connection.

SIMATIC AFD & SIMATIC AFDiSD devices is connected to SIMATIC FIELD DEVICE COUPLER.

As you can see the image which I have attached in topic, which has Fault LED ON.

I have also attached the image which show the device unrecognised in PLC, (TIA portal)

Hardware with connection:

Topology used :- Ring Topology using PROFIBUS DP

CPU 1517-3 PN/DP <-> ET200M with Di / Do modules <-> ET200M with Ai / Ao modules <-> (ET200M with FIELD DEVICE COUPLER)

Software : TIA PORTAL V17

is there any solution to resolve this issue.

Thank you very much to Whoever replies.