Speed Deviation Monitoring - Siemens SINAMICS G120D Operating Instructions Manual

8.23.7

Speed deviation monitoring

The converter calculates and monitors the speed or velocity of a machine component.
Examples of how the function can be used:
• Gearbox monitoring for traction drives and hoisting gear
• Drive belt monitoring for fans and conveyor belts
• Blocking protection for conveyor belts
You need an electronic sensor, e.g. a proximity switch, for the "Speed monitoring" function. The
converter analyzes an encoder signal at max. 32 kHz.
To use the function, you must connect the encoder to one of the digital inputs DI 1 or DI 2 and
connect the relevant digital input with the function in the converter.
Figure 8-62
Function description
Figure 8-63
The converter compares speed r0586 with the actual speed value r2169 and signals an excessive
deviation between the encoder signal and the motor speed. p2181 specifies the converter
response for an excessive deviation.
The "Probe" subfunction calculates the speed from the pulse signal of the digital input.
1)
Additional information is provided in the List Manual (the parameter list and function diagram
8013).
Converter with the control units CU240D-2
Operating Instructions, 10/2020, FW V4.7 SP13, A5E34262100B AH
Speed deviation monitoring
Time response of the speed monitoring
Advanced commissioning
8.23 Monitoring the driven load
275