Siemens Sinamics S120 Function Manual page 288

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Basic functions
6.18 Tolerant encoder monitoring
Fault profile
286
Fault description
Zero mark too wide
EMC faults
Zero mark too early/late
(interference pulse or
pulse loss on the A/B
track)
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Remedy
Use edge evaluation of the
zero mark
Use an adjustable
hardware filter
For faults, use pole
position adaptation or
pulse number correction
Drive functions

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