User guide

13-2
FlexPak 3000 DC Drive Software Reference
F00002
TACHOMETER LOSS
Tachometer or encoder feedback signal missing.
Possible causes:
•
Tachometer or encoder coupling failure.
•
Disconnected, loosely connected, or damaged tachometer or encoder
wires.
•
Pulse encoder supply voltage low.
•
Incorrect analog tachometer scaling.
•
Incorrect pulse encoder configuration.
•
Motor armature winding not connected or open circuit.
•
Blown inverting fault (DC) fuse.
•
Inverting fault breaker tripped.
•
High inertia loads and high inductance armature circuits. To reduce
nuisance faults, increase the firing angle threshold (see section 13.2).
•
Tachometer or encoder failure.
F00003
OVERSPEED
Motor speed exceeded the 110% of
TOP SPEED
.
Possible causes:
•
Incorrect tachometer or encoder scaling.
•
Blown field supply fuse(s).
•
Improper speed loop tuning.
•
PULSE TACH QUADRATURE
set to
ON
for a non-regenerative drive.
•
Incorrect pulse encoder wiring.
F00004
FIELD CURRENT LOSS
Standard or enhanced field supplies: The field loss detection circuit does
not sense any field current flowing in the motor shunt field.
Field Current Regulator kit field supply:
FIELD FEEDBACK
(P.589) fell below
the
FIELD LOSS THRESHOLD
(P.512).
Possible causes:
•
Motor field winding not connected or open circuit.
•
Blown field supply fuse(s).
•
Blown AC line fuse(s).
•
Field supply failure.
•
Disconnected, loosely connected, or damaged wiring harness.
•
Field Current Regulator kit only: Improper field loop tuning.
Table 13.1 – Fault Codes (Continued)
Code OIM Display Description