Watson-Marlow MM440 - Manual (Page 223)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0 223
3.20.2 Load torque monitoring
Parameter range: P2181
P2182 – P2192
r2198
Warnings A0952
Faults F0452
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).
P2186
P2185
P2188
P2187
P2190
P2189
P2183 P2184
Torque [Nm]
Frequency
[Hz]
P1082
0
1 r2198
Bit 11
t
P2192 P2192
A0952
Actual
torque
P2182
Fig. 3-88 Load torque monitoring (P2181 = 1)
Drive
shaft
Deflection
roll
Fig. 3-87 Shaft drive with flat belts