Tolerant Encoder Monitoring - Siemens SINAMICS S120 Function Manual

Basic functions

8.21 Tolerant encoder monitoring

8.21 Tolerant encoder monitoring
Function description
The tolerant encoder monitoring offers the following expanded functionality regarding the
evaluation of encoder signals:
● Encoder track monitoring (Page 369)
● Zero mark tolerance (Page 370) (also for other sensor modules)
● Freeze speed raw value (Page 371)
● Adjustable hardware filter (Page 371)
● Edge evaluation of the zero mark (Page 372)
● Pole position adaptation (Page 373)
● Pulse number correction for faults (Page 374)
● Monitoring, tolerance band, pulse number (Page 375)
● Expansion of the encoder evaluation (1x, 4x) (Page 376)
● Setting the measuring time to evaluate speed "0" (Page 377)
● The number of current controller cycles can be set to generate the average value of the
speed actual value (Page 377)
These supplementary functions allow you to improve the evaluation of your encoder signals.
This may be necessary in special cases where the Control Unit receives incorrect encoder
signals or specific properties of the signals must be compensated for.
Some of these supplementary functions can be combined with one another.
Commissioning the function
The tolerant encoder monitoring is commissioned using parameters p0437 and r0459.
r0458.12 = 1 indicates whether your hardware supports the expanded encoder properties.
Note
● You can only parameterize the tolerant encoder monitoring functions when commissioning
the encoder. The encoder monitoring parameters cannot be changed while the drive is
running!
● The functions described in the following apply to SMC30 modules and to Control Units with
internal encoder evaluation.
368
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions