Siemens SIMATIC ET 200SP Manual page 63

Diagnostic alarm Error
code
Wire break at 505
digital input A, B
or N
Overheating 506
No longer available as of module version V1.2. This case is then taken into account by diagnostic interrupt "Load volt-
1
age missing".
Technology Module TM Count 1x24V (6ES7138-6AA00-0BA0)
Manual, 02/2017, A5E33002339-AB
Meaning
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
Possible causes:
H
Short circuit or overload at the digital out-
•
puts or output of the encoder supply
Ambient temperature outside specifications
•
Interrupts/diagnostic messages
5.2 Diagnostic messages
Remedy
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
Check process wiring
•
Improve cooling
•
Check connected loads
•
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