Troubleshooting and fault elimination – Lenze EVF9333−xV User Manual
Page 453
Troubleshooting and fault elimination
Fault elimination
Behaviour in case of overvoltage in the DC bus (OU message)
9.4
9.4.3
l
9.4−3
EDSVF9333V EN 6.2−04/2012
9.4.3
Behaviour in case of overvoltage in the DC bus (OU message)
If the DC−bus voltage (U
DC
) exceeds the switch−off threshold OU, the pulse
inhibit is set. At the same time, an internal timing element starts for a delay
time (C0912).
The pulse inhibit is deactivated if the voltage falls below the switch−on
threshold OU and the delay time has elapsed.
Switching thresholds in case of overvoltage in the DC bus (OU):
Mains voltage range
C0173
Switch−off threshold
OU
Switch−on threshold
OU
< 400 V
Operation with /
without brake
chopper
0
770 V
755 V
400 V
Operation with /
without brake
chopper
1
*
770 V
755 V
460 V
Operation with /
without brake
chopper
2
770 V
755 V
480 V
Operation without
brake chopper
3
770 V
755 V
480 V
Operation with brake
chopper
4
800 V
785 V
*
Lenze setting
Codes for parameter setting
Code
Possible settings
IMPORTANT
No.
Name
Lenze Selection
C0912 OV delay time
à
−
{1 ms}
− Delay time of the pulse enable
after an OU message
à
Depending on C0082, C0086,
C0087, C0088, C0089, C0090,
C0091, C0092
A change of one of the codes
resets C0912 to the time of the
selected motor
l
The time is derived from the
double rotor time constant
^
8.2−25
^
8.2−48
^
9.4−3
Description