Siemens SINAMICS S120 Function Manual page 345

Fault profile
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
7.19 Tolerant encoder monitoring
Fault description
Zero mark too wide
EMC faults
Zero mark too early/late
(interference pulse or
pulse loss on the A/B
track)
Basic functions
Remedy
Use edge evaluation of
the zero mark
Use an adjustable
hardware filter
For faults, use pole
position adaptation or
pulse number correction
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