Configuration
7-248

SHB9300CRV EN 2.0
7.7.3.1 Undervoltage LU
Purpose
Monitores the DC-bus, protects the controller.
MONIT
V
DC
-VOLTAGE
MONIT-LU
C0053
C0173
Fig. 7-194 Undervoltage LU
Signal
Source Note
Name Type DIS DIS format CFG List Lenze
V
DC
-VOLTAGE - C0053 dec - - - assignment cannot be changed
MONIT-LU d - - - - - -
Mains voltage range Selection number
(C0173)
Switch-off threshold LU Switch-on threshold LU
< 400 V 0 285 V 430 V
400 V 1 285 V 430 V
400
¡
460 V 2 328 V 473 V
480 V without brake chopper 3 342 V 487 V
Operation with brake chopper (up to 480
V)
4 342 V 487 V
Function
The monitoring will be activated if the DC-bus voltage (terminals +U
DC
and -U
DC
) falls below the
threshold (switch-off threshold LU) which has been set under code C0173.
The message will be reset as soon as the value is higher than the switch-on threshold LU set.
The switch-off threshold LU determines the voltage level of the DC-bus voltage at which the pulse
will be inhibited.
The selection number also applies to the overvoltage monitoring (OU).
The code setting is to be adapted to the existing mains voltage (also for +U
DC
/-U
DC
terminals). If
several controllers are connected via a DC-bus, all controllers must have the same settings.
If the LU message is indicated for more than 3 seconds or if the mains is switched on, the event will
be entered into the history buffer. This might happen when the control module is supplied from an
external supply via terminals X5/39 and X5/59 and the mains is switched off.
If the signal is reset (mains is switched on again) the entry in the history buffer will not be continued
but deleted (since it is not a fault but a controller status).
If the undervoltage message is not indicated for 3 seconds but for a shorter period of time, the event
will be interpreted as fault (e.g. mains fault) and entered into the history buffer. In such a case the
history buffer entry will be continued.
Features:
l
LECOM No.: 1030
l
Reaction: MESSAGE (unchangeable)
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