Fault in Siemens ET200S


Thread Starter


Hi to all,

I have Fault in Siemens ET200S (6es7 151-1aa03-0ab0) from time to time. several of ET200S connect to S7-400 via profibus. occasionally one of the ET200S is not connected and the fault LED are ON in this succession:

1. 8 time the SF LED flashing
2. then 3 time the BF LED flashing in cyclic form

anyone can help my to solve this problem?

Thanking you in advance.
Try checking that the rack is correctly assembled and all cards are firmly in place. Also make sure the end plate/resistor is in place. You need to clear the SF before you'll be able to clear the bus fault.