Siemens SIMATIC ET 200SP Manual page 63

Diagnostic alarm Error
code
Short circuit or 10E
overload at exter-
nal encoder supply
Error at the digital 10F
outputs
Supply voltage 110
error
Illegal A/B signal 500
ratio
RS422/TTL error 502
Technology module TM PosInput 1 (6ES7138-6BA00-0BA0)
Manual, 04/2016, A5E33015755-AC
Meaning
Error at encoder supply
•
H
Possible causes:
•
– Short circuit
– Overload
Error at the digital outputs
•
H
Possible causes:
•
– Short circuit
– Overload
Error at supply voltage L+
•
H
Possible causes:
•
– Low voltage
– Wiring of L+ supply voltage defective
Time profile of signals A and B of the
•
H
incremental encoder does not meet cer-
tain specifications
Possible causes:
•
– Signal frequency too high
– Encoder faulty
– Process wiring faulty
Error at connection of the RS 422, TTL
•
H
encoder or SSI absolute encoder
Possible causes:
•
– Wire break
– No encoder connected
– Cable too long
– Short circuit
– Overload
– External voltage
– Overheating
– Parameter assignment error
Interrupts/diagnostic messages
5.3 Diagnostic messages
To correct or avoid errors
Check encoder wiring
•
Check consumers connected to encoder
•
supply
Check wiring at the digital outputs
•
Check consumers connected to the
•
digital outputs
Check the L+ supply voltage
•
Check the wiring of the supply voltage
•
L+ on the BaseUnit
Checking total consumption of the load
•
group
Check process wiring
•
Check encoder/sensor
•
Check parameter assignment
•
Check process wiring
•
Check encoder/sensor
•
Check parameter assignment
•
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