LED designation Function Meaning
BUS ERROR PROFIBUS communication Blinks if there is an error in
connection with the fieldbus
POWER Operating voltage display
of internal electronic components
Lights up if operating voltage
is applied to pin 1
and the node
is ready for use
POWER V Operating voltage display
of valves
Lights up if operating
voltage of valves
is ok (pin 2);
blinks if operating voltage
is < 20.4 V
0..3 CP string LED During start-up phase:
blinks if the string assignment
has been changed since
the last operation
during operation:
lights up if a CP connection
has been interrupted
3.1.1 Normal operating status
In normal operating status the following LEDs light up
on CP node 13:
( = lights up; = LED flashes; = out)
LEDs Operating status Error treatment
BUS
POWER
POWER V
normal none
3. Diagnosis
3-4 CP FB13-E 9904b
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