Siemens SIMATIC ET 200SP Manual page 81

Interrupts/diagnostic messages
5.2 Diagnostic messages
Diagnostic alarm Error
code
Error at digital 10F
outputs
Invalid transition of 500
A/B signals
Wire break at 505
digital input A, B
or N
80
Meaning
Error at the digital outputs
•
H
Possible causes:
•
– Short circuit
– Overload
Time profile of signals A and B of the in-
•
H
cremental encoder does not meet certain
requirements (relative phase shift of the
two signals is too small)
Possible causes:
•
– Signal frequency too high
– Encoder faulty
– Process wiring faulty
Channel not connected
H
Resistance of encoder circuit too high
Interruption of the line between technology
module and encoder
Sensor used is sourcing output or sinking
output only
Remedy
Check wiring at the digital outputs
•
Check consumers connected to the
•
digital outputs
Check process wiring
•
Check encoder/sensor
•
Check parameter assignment
•
Connect the channel
Use a different encoder type or modify
•
the wiring, for example, use shorter
cables with larger cross-sections
Check encoders
•
Check process wiring
Correct parameter assignment
TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD