– bus connector limit switch not set correctly – address and dip switches not set according
to the electrical scheme (bus subscriber) – wire defect
– bus connector defect
– bus modul or subscriber defect.
To narrow the error you have to check the status with all the subscribers.
To test, switch the limit switch into the bus connector => the bus runs now to the corresponding subscriber, e.g. “Lenze inverter” which the LED flashes yellow.
If you are able to narrow in the error, exchange the corresponding components.
Do not forget to set the parameter and the dip switches accordingly. The parameters are mentioned in the electrical scheme!
BF LED (red) not active
LED upper-left must light up (green)
LED upper-right must be flashing (yellow)
Error LED not active or no error code profibus