Lenze ECSEM Series

Monitoring functions
Configuring monitoring functions
DC−bus voltage monitoring (OU, LU)
9

241
EDBCSXM064 EN 11.0
9.3.11 DC−bus voltage monitoring (OU, LU)
Fault message Monitoring function System variable
Possible response
TRIP Messag
e
Warnin
g
Off
020 OU Overvoltage MCTRL_bOvervoltage_b ·
030 LU Undervoltage MCTRL_bUndervoltage_b ·
· Default setting
üSetting possible
These monitoring functions monitor the DC bus and protect the controller.
ƒ If the DC−bus voltage at terminals +U
G
and −U
G
exceeds the upper switch−off
threshold set in C0173, an OU message is sent.
ƒ If the DC−bus voltage at terminals +U
G
and −U
G
falls below the lower switch−off
threshold set in C0174, an LU message is sent.
The monitoring response remains active until the corresponding threshold is fallen
below/exceeded again.
 Note!
All drive components in DC−bus connections must have the same thresholds!
Switch−off and switch−on thresholds
ƒ The switch−off threshold defines the voltage level of the DC−bus voltage, at which
the pulse inhibit is activated.
ƒ The switch−off and switch−on thresholds dependent on C0173 can be gathered from
the following table: