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Fault tracing
3ADW000379R0501 DCS550 Manual e e
5. A111 MainsLowVolt is set as long as the mains voltage recovers, before PowrDownTime (30.24) is
elapsed. Otherwise, F512 MainsLowVolt is generated.
If the mains voltage returns before PowrDownTime (30.24) is elapsed and the overriding control keeps the
commands On (MCW bit 0) and Run (MCW bit 3) = 1, the drive will start again after 2 seconds. Otherwise,
the drive trips with F512 MainsLowVolt.
When the mains voltage drops below UNetMin2 (30.23), the action is selected by means of PwrLossTrip
(30.21):
1. the drive is immediately tripped with F512 MainsLowVolt or
2. the drive starts up automatically, see description for UNetMin1 (30.22). Below UNetMin2 (30.23) the field
acknowledge signals are ignored and blocked
Notes:
−
UNetMin2 (30.23) is not monitored, unless the mains voltage drops below UNetMin1 (30.22). Thus, for
proper operation, UNetMin1 (30.22) must be larger than UNetMin2 (30.23).
−
If no UPS is available, set PwrLossTrip (30.21) to Immediately. Thus, the drive will trip with F512
MainsLowVolt avoiding secondary phenomena due to missing power for AI’s and DI’s.
−
In case the On command [UsedMCW (7.04) bit 0] is given and the measured mains voltage is too low for
more than 500 ms A111 MainsLowVolt [AlarmWord1 (9.06) bit 10] is set. It the problem persist for more
than 10 s F512 MainsLowVolt [FaultWord1 (9.01) bit 11] is generated.
Drive behavior during auto-reclosing
Auto-reclosing
Mains synchronism
As soon as the main contactor is closed and the firing unit is synchronized with the incoming voltage,
supervising of the synchronization is activated. If the synchronization fails, F514 MainsNotSync will be
generated.
The synchronization of the firing unit takes typically 300 ms before the current controller is ready.
Mains overvoltage
The overvoltage level is fixed to 1.3 * NomMainsVolt (99.10). Exceeding this level for more than 10 s and
RdyRun = 1 causes F513 MainsOvrVolt.
AutoReclosing
MainsVoltActRel (1.11)
UNetMin1 (30.22)
UNetMin2 (30.23)
PowrDownTime (30.24)
2 s
A111 MainsLowVolt
F512 MainsLowVolt
PwrLossTrip (30.21)
Immediately
=
DZ_LIN_012_autom-einschalt_a.ai
AuxStatWord (8.02) bit 15
speed ramp follows speed actual
hold speed controller integrator
PowrDownTime (30.24) is exceeded:
F512 MainsLowVolt , if
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