290
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
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.
F513 513 MainsOvrVolt Mains overvoltage (AC):
Actual mains voltage is > 1.3 * NomMainsVolt (99.10) for
more than 10 s and RdyRun = 1. Check:
−
if the mains voltage is within the set tolerance
−
if the mains voltage scaling is correct [NomMainsVolt
(99.10)]
−
connector X12 and X13 on SDCS-CON-F
−
connector X12 and X13 on SDCS-PIN-F
9.01,
bit 12
RdyRun = 1 1
F514 514
MainsNotSync
Mains not in synchronism (AC):
The synchronization with the mains frequency has been
lost. Check:
−
mains supply
−
fuses etc.
−
mains frequency (50 Hz
±
5 Hz; 60 Hz
±
5 Hz) and
stability (df/dt = 17 %/s) see PLLIn (3.20) at 50 Hz one
period == 360° == 20 ms = 20,000 and at 60 Hz one
period == 360° == 16.7 ms = 16,6667
9.01,
bit 13
RdyRun = 1 3
F515 515
M1FexOverCur
Field exciter overcurrent:
Check:
−
in case this fault happens during field exciter
autotuning deactivate the supervision by setting
M1FldOvrCurLev (30.13) = 135
−
M1FldOvrCurLev (30.13)
−
parameter settings of group 44 (field excitation: field
current controller tuning)
−
connections of field exciter
−
insulation of cables and field winding
−
resistance of field winding
9.01,
bit 14
RdyRun = 1 1
F517 517
ArmCurRipple
Armature current ripple:
One or several thyristors may carry no current. Check:
−
CurRippleSel (30.18), CurRippleLim (30.19)
−
for too high gain of current controller [M1KpArmCur
(43.06)]
−
current feedback with oscilloscope (6 pulses within one
cycle visible?)
−
thyristor gate-cathode resistance
−
thyristor gate connection
9.02,
bit 0
RdyRef = 1
3
F522 522 SpeedFb
Speed feedback:
The comparison of the speed feedback from pulse
encoder or analog tacho has failed. Check:
−
M1SpeedFbSel (50.03), SpeedFbFltMode (30.36),
SpeedFbFltSel (30.17), EMF FbMonLev (30.15),
SpeedFbMonLev (30.14)
−
pulse encoder: encoder itself, alignment, cabling,
coupling, power supply (feedback might be too low),
mechanical disturbances, jumper S4 on SDCS-CON-F
9.02,
bit 5
always
3
Summary of Contents for DCS550 Series
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Page 141: ...141 Winder 3ADW000379R0501 DCS550 Manual e e ...
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