Application parameter group 10
PARAMETER DESCRIPTION 268
Over excitation deceleration function
Over excitation deceleration(10-51
(P.264)
=1)
Over excitation control can suppress the increasing of DC bus voltage. The larger over excitation gain is, the
stronger suppressing effect is.
When voltage stall occurs in over excitation deceleration, it is necessary to prolong the deceleration time or
increase the over excitation gain 10-53
(P.266)
.
When current stall occurs in over excitation deceleration, it is necessary to prolong the deceleration time or
decrease the over excitation gain 10-53
(P.266)
.
Note: 1. As regenerative energy is mainly dissipated as heat in motor, motor temperature will rise if over excitation
deceleration is applied frequently.
2. When a run command is given during over excitation deceleration, over excitation operation is canceled and
inverter will re-accelerate to command speed.
3. When PM motor is used, over excitation deceleration function is invalid.
5.11.16 Short-circuit brake function when PM motor start
This parameter is used in open loop PM control. For motor control setting, please refer to 00-21(P.300) and
00-22(P.370).
Parameter
Name
Default Setting Range
Content
10-54
P.362
Short-circuit brake time
when PM motor start
0.0s
0.0～60.0s
---
Sets the time for short-circuit brake operation when PM motor start. By shorting all three motor phases, it produces a
braking torque in the motor and can be used to stop a free running motor before starting it again.
Note: Short Circuit Braking cannot prevent a PM motor from being rotated by an external force. To prevent the load
from rotating the motor, use DC brake.
5.11.17 Built-in PLC
Setting for built-in PLC functions
Parameter
Name
Default
Setting Range
Content
10-55
P.780
PLC function selection
0
0
Off
1
PLC RUN signal from digital input terminal function 60
or 10-56 (P.781)。
2
PLC RUN signal from digital input terminal function 60
10-56
P.781
PLC run
0
0
Off
1
PLC RUN
10-57
P.782
PLC program erase
function
0
0
Off
1
Erase the PLC program, after erase success
parameter value is 0.
10-58
P.783
PLC choose register to
monitor
0
0~326
PLC Component monitoring type selection
10-59
P.784
PLC register
monitoring value
Read only
Read only
PLC Component state monitoring
Setting
