Load Torque Monitoring - Siemens MICROMASTER 440 Operating Instructions Manual

Issue 10/06
3.20.2

Load torque monitoring

Parameter range:
Warnings
Faults
Function chart number:
This function allows the mechanical
force transmission between the motor
and driven load to be monitored.
Typical applications include, for
example, pulley belts, flat belts or
chains, or pulleys for toothed wheels
of drive-in and drive-out shafts which
then transmit circumferential
velocities and circumferential forces
(refer to Fig. 3-87). The load torque
monitoring function can then detect
whether the driven load is locked or the force transmission has been interrupted.
For the load torque monitoring function, the actual frequency/torque characteristic
is compared with the programmed frequency/torque characteristic (refer to P2182 –
P2190). If the actual value lies outside the programmed tolerance bandwidth, then,
depending on parameter P2181, either warning A0952 or fault F0452 is generated.
Parameter P2192 can be used to delay the output of the warning or fault message.
This avoids erroneous alarms which could be caused by brief transient states (refer
to Fig. 3-88).
Torque [Nm]
P2189
P2190
P2187
P2188
P2185
P2186
1
r2198
Bit 11
0
Fig. 3-88
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
P2181
P2182 – P2192
r2198
A0952
F0452
-
P2182 P2183
P2192
Load torque monitoring (P2181 = 1)
Fig. 3-87 Shaft drive with flat belts
P1082
Actual
torque
Frequency
[Hz]
P2184
A0952
P2192
3 Functions
Drive
shaft
Deflection
roll
t
223