
292
Fault tracing
3ADW000379R0501 DCS550 Manual e e
7-segment
display
Text on DCS
Control Panel
and DWL
Definition / Action
Fault-
word
Fault is
active when
T
ri
p
level
−
M1OvrSpeed (30.16)
−
parameter settings of group 24 (speed control: speed
controller)
−
scaling of speed controller loop [SpeedScaleAct (2.29)]
−
drive speed [MotSpeed (1.04)] vs. measured motor
speed (hand held tacho)
−
field current too low
−
speed feedback (encoder, tacho)
−
connection of speed feedback
−
if the motor was accelerated by the load
−
the armature circuit is open (e.g. DC-fuses, DC-
breaker)
F540 540 COM8Faulty SDCS-COM-8 faulty:
Check:
−
Change SDCS-COM-8 and / or SDCS-CON-F
9.03,
bit 7
RdyOn = 1
1
F541 541
M1FexLowCur
Field exciter low (under-) current:
Check:
−
M1FldMinTrip (30.12) , FldMinTripDly (45.18)
−
parameter settings of group 44 (field excitation: field
current controller tuning, EMF controller tuning, flux
linearization)
−
motor name plate for minimum current at maximum
field weakening (maximum speed)
−
field circuit fuses
−
if the field current oscillates
−
if the motor is not compensated and has a high
armature reaction
9.03,
bit 8
always
1
F543 543 COM8Com
SDCS-COM-8 com. loss:
Check:
−
Change SDCS-COM-8 and / or SDCS-CON-F
9.03,
bit 10
RdyOn = 1
5
F546 546
LocalCmdLoss
Local command loss:
Com. fault with DCS Control Panel, DWL during local
mode. Check:
−
LocalLossCtrl (30.27)
−
if control DCS Control Panel is disconnected
−
connection adapter
−
cables
9.03,
bit 13
local
5
F547 547 HwFailure
Hardware failure:
For more details, check Diagnosis (9.11).
9.03,
bit 14
always
1
F548 548 FwFailure
Firmware failure:
For more details, check Diagnosis (9.11).
9.03,
bit 15
always
1
F549 549 ParComp
Parameter compatibility:
When downloading parameter sets or during power-up the
firmware attempts to write their values. If the setting is not
possible or not compatible, the parameter is set to default.
The parameters causing the fault can be identified in
Diagnosis (9.11). Check:
−
parameter setting
9.04,
bit 0
always
1
F550 550
ParMemRead
Parameter read:
Reading the actual parameter set or a user parameter set
9.04,
bit 1
always
1
Содержание DCS550 Series
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