Siemens SINAMICS S120 Function Manual page 52

Extended Functions
4.8 Safe actual value acquisition
Actual value synchronization
Figure 4-9
The mean value of the actual values of both encoders is calculated cyclically after actual
value synchronization (p9301.3 = p9501.3 = 1) was activated. The maximum slip defined in
p9349/p9549 is monitored within the crosswise comparison clock cycle (r9724). If "actual
value synchronization" is not enabled, the value parameterized in p9342/p9542 is used as
tolerance value for the crosswise comparison.
Overview of important parameters (refer to the List Manual)
● p9301.3 SI motion enable safety functions (Motor Module), actual value synchronization
● p9501.3 SI motion enable safety functions (Control Unit), actual value synchronization
● p9302 SI motion axis type (Motor Module)
● p9502 SI motion axis type (Control Unit)
● p9317 SI motion linear scale, grid division (Motor Module)
● p9517 SI motion linear scale, grid division (Control Unit)
● p9318 SI motion encoder pulses per revolution (Motor Module)
● p9518 SI motion encoder pulses per revolution (Control Unit)
● p9319 SI motion fine resolution Gn_XIST1
● p9519 SI motion fine resolution G1_XIST1 (Control Unit)
● p9320 SI motion spindle pitch
● p9520 SI motion spindle pitch (Control Unit)
● p9321[0...7] SI motion gearbox encoder/load denominator (Motor Module)
● p9521[0...7] SI motion gearbox encoder/load denominator (Control Unit)
● p9322[0...7] SI motion gearbox encoder/load numerator (Motor Module)
● p9522[0...7] SI motion gearbox encoder/load numerator (Control Unit)
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Example diagram of actual value synchronization
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Safety Integrated