Siemens SINAMICS S120 Function Manual page 375

Replacing motors for safety without encoder
When using safety functions without encoder, the motor pole pair number plays a decisive
role. If a motor is replaced, then the behavior depends on the pole pair number: If a motor
with a higher pole pair number is used (other than that configured), the mechanical speed is
less than that calculated by Safety Integrated. If a motor with a lower pole pair number is
used (e.g. when a motor is replaced), the mechanical speed is higher than that calculated by
Safety Integrated.
● After a replacement such as this, perform a test by comparing the safe actual speed
(r9714) with the normal speed (r0063 or the output frequency), and if required, correct the
configured pole pair number.
Acceptance test and acceptance report
Unwanted motion if components are replaced without a function test
After a component replacement, connections or functions can be defective so that death or
serious injury can result if a person enters the danger zone of the motors.
• After component replacement, always run a simplified function test.
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• r9670
• r9671[0...n]
• p9672
• p9673
• p9674
• p9675
• p9676
• p9702
• r9776
• r9793[0...9]
• r10070
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
WARNING
You can find more detailed information in the chapters "Test scope for specific
measures (Page 341)" and "Acceptance test (Page 331)".
SI module identification Control Unit
SI module identification Motor Module
SI module identification Power Module
SI module identification sensor channel 1
SI module identification sensor channel 2
SI module identification sensor channel 1
SI module identification sensor channel 2
Acknowledge SI component replacement
SI diagnostics
SI diagnostics component replacement
SI TM54F module identification
9.1 Information pertaining to component replacements
Maintenance
373