Functions
8.9 Application-specific functions
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
237
Stall protection
Principle of operation
If the speed lies below the value of p2175 for the time set in p2177, and the converter is
operating at the current or torque limit, using bit 6 of status word 2 for monitoring functions
(r2198.6), the converter outputs the "Motor blocked” message.
The converter goes to the current or torque limit if the setpoint speed is significantly higher
than the actual speed.
Applications: Extruders and mixers
p2175
Motor blocked speed threshold (
factory setting: 120 rpm)
p2175 = 0: Blocking protection deactivated
Motor blocked delay time (factory setting: 3 s)
Stall protection
Principle of operation
If the value in r1746 exceeds the value of p1745 for the time set in p2178, using bits 7 of
status word 2, for monitoring functions (r2198.7) the converter outputs the "Motor stalled"
message.
Applications: General system protection
p1745
Motor model fault threshold value stall detection (
factory setting: 5 %)
If the motor stalls too early with this setting, then using the trace function you have
the option of determining a better value. To do this, set p1745 = 100.
Motor stalled delay time (factory setting: 0.01 s)
The load monitoring comprises the following components:
● Load failure monitoring
● Monitoring for torque deviation
● Pump monitoring
● Fan monitoring
If the load monitoring detects load failure, then the converter always goes into a fault
condition and outputs fault F07936. For a torque and speed deviation, as response, you can
either set an alarm or a fault. Details are provided in the following descriptions.
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