Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
717
of 820
4
4.11 Monitoring
4.11.1 Field angle monitoring
Field Angle Monitoring on Synchronous Machines
The controller determines the pole wheel direction of the rotor with the aid of the motor
model. This is then compared with the pole wheel direction which is calculated from the
encoder used for motor control. When the monitoring is enabled (i.e. the monitoring
threshold
Z143.8– is not equal to 0), if there is an angle error greater than 45° (electrical),
Bit 8 of Parameter Z143.1– is set and the error message
211 Error While Monitoring the Field Angle
is initiated. The pulse enable is blocked as a result.
The cycle time of the monitoring part for error triggering is 1 ms.
Additionally, the field angle monitoring can be switched on and off by setting the field an-
gle speed threshold (143.8) as a function of the speed set value. If the speed is less than
the field angle speed threshold (143.8), the monitoring remains disabled.
Field angle monitoring only functions for the encoder which is set for motor control.
4.11.1.1 Parameter overview
Functional block: FbMonitoring [143]
For Parameter 47.55, see ZCurrent Controller– from page 469
4.11.1.2 Description of the Parameters
143.8 Field angle speed threshold
Speed threshold from which field angle monitoring becomes active. Field angle monitor-
ing is not carried out below the threshold.
Value 0 will completely switch off field angle monitoring.
Number Name Type Min Max Default Value Unit Factor
Read only
Storage
DS Support
Cyclic Write
143.8 Field angle speed threshhold UINT 0 0xFFFF 10 % 1:1 X
143.9 Field angle counter UINT 0 0xFFFF 0 1:1
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