5.6 Additional Parameters
BU 0200 GB
Subject to technical alterations
127
Parameter
Setting value / Description / Note
Device
Supervisor
Parameter
set
P537 Pulse
switch-off
S
10 ... 200 % / 201
[ 150 ]
This function prevents rapid shutdown of the FI according to the load. With the pulse switch-off
enabled, the output current is limited to the set value. This limitation is implemented by brief
switching off of individual output stage transistors, the actual output frequency remains
unchanged.
10...200% = Limit value related to the nominal FI current
201 =
Function is disabled; the FI supplies the maximum possible current.
NOTE:
The value set here can be undershot by a smaller value in P536.
For smaller output frequencies (<4.5Hz) or higher pulse frequencies (>6kHz or
8kHz, P504) the pulse switch-off by the power reduction (see Section 8.3) can be
undershot.
NOTE:
If the pulse switch-off is disabled (P537=201) and a high pulse frequency is
selected in parameter P504, the FI automatically reduces the pulse frequency
when the power limit is reached. If the load on the FI is again reduced, the pulse
frequency increases to the original value again.
P539 Output
monitoring
S
P
0 ... 3
[ 0 ]
This protective function monitors the output current at the U-V-W terminals and checks for
plausibility. In cases of error, the error message E016 is output.
0 = Disabled:
Monitoring is not active.
1 = Motor phase error only:
The output current is measured and checked for symmetry. If an
imbalance is present, the FI switches off and outputs the error message E016.
2 = Excitation monitoring only:
At the moment the FI is switched on, the level of the
excitation current (field current) is checked. If insufficient excitation current is present, the
FI switches off with the error message E016. A motor brake is not released in this phase.
3 =
Motor phase and excitation monitoring: as 1 and 2 combined
NOTE:
This function can also be used as an additional protective function for lifting
applications, but is not permissible on its own as protection for persons.
