Troubleshooting and fault elimination
Fault elimination
Controller in clamp operation
33
EDKVF93−05 EN 2.0
If the DC−bus voltage (U
DC
) exceeds the switch−off threshold OU, pulse inhibit will be set.
At the same time, an internal timer for a delay time (C0912) will be started.
Pulse inhibit will be reset, if the voltage falls below the switch−on threshold OU and the
delay time has elapsed.
Thresholds for DC−bus overvoltage (OU)
Types EVF93xx−EVV210, EVF93xx−EVV240, EVF93xx−EVV270 and EVF93xx−EVV300
Mains voltage range
C0173
Switch−off threshold OU
Switch−on threshold OU
< 400 V
Operation with or without
brake transistor
0
770 V
755 V
400 V
Operation with or without
brake transistor
1
*
770 V
755 V
460 V
Operation with or without
brake transistor
2
770 V
755 V
480 V
Brake transistor
3
770 V
755 V
480 V
Brake transistor
4
800 V
785 V
500 V
Operation with or without
brake transistor
5
900 V
885 V
*
Lenze setting
Types EVF93xx−EV, EVF93xx−EVV060 and EVF93xx−EVV110
Mains voltage range
C0173
Switch−off threshold OU
Switch−on threshold OU
400 V
Operation with or without
brake transistor
Read only
700 V
685 V
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
