3. Diagnosis
3-6
Festo P.BE-CP-FB13-E-EN en 0112e
3.1.3 Diagnosis LED BUS ERROR
Possible PROFIBUS-specific LED displays on the operating
status of the CP node can be found in the following table.
LED
Colour Operating status Error treatment
BUS
ERROR
Red
flashes fast
Station number not permitted S Correct station number
(0, ..., 125)
BUS
ERROR
Red
flashes at
1-second
intervals
Field bus connection not correct.
Possible causes:
– Station number not correct
(e.g. address assigned twice)
– Switched- off or defective field
bus module
– Interrupted, short-circuited or
faulty field bus connection
– Configuration not correct,
nominal • actual status
Check the ...
S Setting of the address selector
switch
S Field bus module
S Field bus connection
S Configuration
BUS
ERROR
Out Valve test –
(Conclude valve test)