11
11-7
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Table 11-1 Diagnostic Interrupts for Internal Errors, continued
Event
Number
Error Signal,
Error Analysis and Rectification
Bit
8.0
Encoder wire breakage
0x8090
or
10.0
Cause Encoder cable cut or not plugged in.
Encoder has no quadrature signals.
Incorrect pin assignment.
Cable length too long.
Encoder signals short circuited.
Effect See Page 11-3
The outputs are switched off.
With incremental encoders, synchronization is deleted.
Start enable is deleted.
Rectifica-
tion
Check encoder cable.
Keep within encoder specification.
Monitoring can be temporarily suppressed under the owner’s responsibility by
parameterization in the parameterization interface.
Keep to the module technical data.
8.1
Errors for absolute encoders
0x8091
or
10.1
Cause The frame traffic between FM 351 and the absolute encoder (SSI) is erroneous or
interrupted:
Encoder cable cut or not plugged in.
SSI frame error; Start/stop bit error detected during measurement data acquisi-
tion.
Prefix and suffix bits (actual useful bits up to clock boundary) in frame not zero
(encoder value outside encoder range).
Change in encoder value greater than 1/4 encoder range.
Effect See Page 11-3
The outputs are switched off.
Start enable is deleted.
Rectifica-
tion
Check the encoder cable.
Check the encoder.
Check the frame traffic between encoder and FM 351.
Error Handling
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