Monitoring functions
Configuring monitoring functions
DC−bus voltage monitoring (OU, LU)
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EDBCSXS064 EN 4.0
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!
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