Diagnosis
Parameter manual b maXX BM3000
Document no.: 5.12001.07 Baumüller Nürnberg GmbH
698
of 820
4.9
175.1 Mode PU temperature model
The parameter can be changed in the inhibited state, only.
Bit 0:
From controller version V01.09 onwards and important only for devices, which support
the overload monitoring model PU temperature model (see Status PU temperature model
Z175.2–).
If the PWM reduction is released the PWM frequency is halved, if the temperature moni-
toring of the power semiconductors exceed a certain threshold.
Bit 1:
Only of importance if both models of the overload monitoring are existent (availability tem-
perature model: Z175.2– bit 1 = 1, availability lxt model Z175.2– bit 2 = 1).
Selection:
0: The temperature model is activated
1: The lxt model is activated
If the device supports both models the lxt model will be active in general (>175.1<
bit
1 = 0).
A change of the overload monitoring model (setting in the parameter list) is valid after the
device was switched on and off again.
Bit-no. Meaning
0 PWM reduction mode
0: not enabled
1: enabled
1 From firmware version 01.10:
Selection of the PU overload monitoring model at availability of the tem-
perature model and the Ixt model:
0: Ixt model is activated
1: Temperature model is activated
15 ... 2 Reserved
NOTE!
Before the PWM reduction can be released the user must assure the following:
m The drive must operate correctly with the reduced switching frequency (e.g. mea-
suring data of the motor, control quality at reduced current controller band width
a.s.o. must be checked).
m The drive components must tolerate the reduced switching frequency (e.g. check
motor filter, if it is existing). This is very important, if the PWM frequency is reduced
to 2
kHz.
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