7-16 Trips and Fault Finding
DC590+ Series DC Digital Drive
Trip Message and Meaning Possible Reason for Trip
ACCTS FAILED
AC current transformer plug connection to Drive
power board missing
Check armature current transformer plug for correct installation.
Frame 5 only : Load imbalance between the two parallel power stacks
Note:
The trip prevents the contactor closing and the current loop activating
without armature current feedback - important in the case of external stack
controllers where the thyristor stack is remote from the control board.
AUTOTUNE ERROR
Error has been encountered during the Autotune
process to include:
Speed feedback has exceeded 20% of rated speed
Field current feedback has exceeded 6% of rated
field current
The motor shaft was rotating, or was caused to rotate.
The field current was seen to exceed 6%, when a field-off Autotune had been
selected, or the field current stopped during a field-on Autotune.
The drive to armature wiring was open-circuit.
The discontinuous current boundary was found to exceed 200% of either the stack
rating or the nominated motor armature current rating (refer to Chapter 5:
"Control Loops" - Manual Tuning)
Large imbalance in the three-phase voltages of the supply (refer to Chapter 5:
"Control Loops" - Manual Tuning)
A hardware fault relating to current feedback was detected on the control board.
AUTOTUNE ABORT
The Autotune sequence has been aborted.
Coast Stop, Program Stop, Enable or Start Run terminal(s) disabled during
Autotune sequence
The AUTOTUNE parameter reset during the Autotune sequence
Autotune sequence has timed-out (approximately 2 minutes).
SEQ PRE READY
Coding not present.
Replace power board or chassis.
CONTACTOR DELAY
The internal auxiliary 3-phase contactor failed to
close.
Check the position of the Calibration Scaling Switch - refer to
5HCalibration Checks,
page
6H7-3.
EXTERNAL TRIP Customer alarm! Trip operates if input open or high impedance.
Alarm time delay : 0.2 seconds
Device not wired to drive or device open circuited : check C1 to C2 connections to
drive - connect C1 to C2 if customer device not fitted.
REMOTE TRIP
REM. SEQUENCE parameter Remote Trip flag set to zero.
ENABLE LOW
Local Mode run with Enable input low
To Next Page
Loading...
