Siemens MICROMASTER 440 Operating Instructions Manual page 224

3 Functions
The frequency/torque tolerance bandwidth is defined by the gray shaded area in
Fig. 3-89. The bandwidth is determined by the frequency values P2182 – P2184
and the torque limits P2186 – P2189. When defining the tolerance bandwidth it
should be ensured that a specific tolerance is taken into account in which the
torque values are allows to vary corresponding to the application.
P2189
Upper torque threshold 3
P2190
Lower torque threshold 3
P2187
Upper torque threshold 2
P2188
Lower torque threshold 2
P2185
Upper torque threshold 1
P2186
Lower torque threshold 1
Fig. 3-89
Commissioning steps
1. In order to define the position of the tolerance bandwidth, different
characteristics must be determined as a function of the required load torque
monitoring (P2181). A differentiation can be made between the following cases:
a) P181 = 1 / 4
Load torque monitoring to detect a broken belt, i.e. under fault conditions,
the actual load torque is below the permissible tolerance bandwidth. In this
case, the load torque characteristic with minimum permissible load should be
determined.
224
|Torque| [Nm]
P1080
Min. frequency
P2182
Threshold frequency 1
Boundary zones
De-activated monitoring
Frequency/torque tolerance bandwidth
P2183
Threshold frequency 2
Threshold frequency 3
Envelope curve
Active monitoring
MICROMASTER 440
Issue 10/06
P1082
Max. frequency
|Frequency|
[Hz]
P2184
Operating Instructions
6SE6400-5AW00-0BP0