Load Torque Monitoring - Siemens MICROMASTER 440 Operating Instructions Manual

Issue 10/06
6.4.18.8

Load torque monitoring

This function monitors the transmission of force between a motor and driven load
within a defined frequency range. Typical applications include, for example,
detecting when a transmission belt breaks or detecting when a conveyor belt is in
an overload condition.
For the load torque monitoring, the actual frequency/torque actual value is
compared to a programmed frequency/torque characteristic (refer to P2182 –
P2190). Depending on P2181, the system monitors whether the permissible torque
curve is either exceeded or fallen below. If the actual value lies outside the
tolerance bandwidth, then after the delay time P2192 has expired, either alarm
A0952 is output or fault F0452.
Belt failure detection mode
P2181 = ...
Parameter P2181 activates or de-activates the load torque monitoring and defines the
response to a load torque fault.
0 Belt failure detection disabled
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
Belt threshold frequency 1
P2182 = ...
Sets a frequency threshold 1 for comparing actual torque to torque the envelope for belt
failure detection.
Belt threshold frequency 2
P2183 = ...
Sets a frequency threshold 2.
Belt threshold frequency 3
P2184 = ...
Sets a frequency threshold 3.
Upper torque threshold 1
P2185 = ...
Upper limit threshold value 1 for comparing actual torque.
Lower torque threshold 1
P2186 = ...
Lower limit threshold value 1 for comparing actual torque.
Upper torque threshold 2
P2187 = ...
Upper limit threshold value 2 for comparing actual torque.
Lower torque threshold 2
P2188 = ...
Lower limit threshold value 2 for comparing actual torque.
Upper torque threshold 3
P2189 = ...
Upper limit threshold value 3 for comparing actual torque.
Lower torque threshold 3
P2190 = ...
Lower limit threshold value 3 for comparing actual torque.
Time delay for belt failure
P2192 = ...
P2192 defines a delay before warning/trip becomes active. It is used to eliminate events
caused by transient conditions. It is used for both methods of fault detection.
MICROMASTER 440
Operating Instructions (Compact)
6 Commissioning
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