Commissioning via the built-in BOP
5.6 Function commissioning
SINAMICS V20 Converter
108 Operating Instructions, 10/2019, A5E34559884-012
5.6.2.9 Setting the load torque monitoring function
Functionality
The load torque monitoring function allows the mechanical force transmission between the
motor and driven load to be monitored. This function can detect whether the driven load is
blocked, or the force transmission has been interrupted.
The converter monitors the load torque of the motor in different ways:
● Motor blocking detection
● No-load monitoring
● Speed-dependent load torque monitoring
Setting parameters
P2177[0...2] Delay time for motor is blocked [ms]
Defines the delay time for identifying that the motor is blocked.
Range: 0 to 10000 (factory default: 10)
P2179 Current limit for no load identified [%] This parameter defines the threshold current for A922 (no
load applied to converter) relative to P0305 (rated motor
current).
Range: 0.0 to 10.0 (factory default: 3.0)
P2180 Delay time for no-load identification [ms] Defines the delay time for detecting a missing output load.
Range: 0 to 10000 (factory default: 2000)
P2181[0...2] Load monitoring mode The load monitoring is achieved by comparing the actual
frequency/torque curve with a programmed envelope (de-
fined by parameters P2182 to P2190). If the curve falls
outside the envelope, a warning or trip is generated.
= 0: Load monitoring disabled (factory default)
= 1: Warning: Low torque/frequency
= 2: Warning: High torque/frequency
= 3: Warning: High/low torque/frequency
= 4: Trip: Low torque/frequency
= 5: Trip: High torque/frequency
= 6: Trip: High/low torque/frequency
Load monitoring threshold frequency 1 [Hz]
Range: 0.00 to 550.00 (factory default: 5.00)
Load monitoring threshold frequency 2 [Hz]
Range: 0.00 to 550.00 (factory default: 30.00)
Load monitoring threshold frequency 3 [Hz]
Range: 0.00 to 550.00 (factory default: 30.00)
Upper torque threshold 1 [Nm]
Range: 0.0 to 99999.0 (factory default: value in r0333)
Lower torque threshold 1 [Nm]
Range: 0.0 to 99999.0 (factory default: 0.0)
Upper torque threshold 2 [Nm]
Range: 0.0 to 99999.0 (factory default: value in r0333)
Lower torque threshold 2 [Nm]
Range: 0.0 to 99999.0 (factory default: 0.0)
Upper torque threshold 3 [Nm]
Range: 0.0 to 99999.0 (factory default: value in r0333)
Lower torque threshold 3 [Nm]
Range: 0.0 to 99999.0 (factory default: 0.0)
Load monitoring delay time [s]
Range: 0 to 65 (factory default: 10)
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