K-TRON KSU-II/KCM Programming Instructions Manual page 70

4 Alarm Messages- Cause and Remedy
4.1 System alarms
Alarm Num- Alarm
06 WT PROC
FAILURE
07
INCORRECTNUM.S
FT
08 BAD SFT
STATUS
09 NO MDU FOUND
10 MOTOR ALARM
11
MDU SERIAL
TIMEOUT
12 MDU THERMAL
OVL
13 MDU SPEED
DEV
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Cause
• SFT(s) failed.
• Serial communication to the load cell
interrupted.
• f = SFT internal failure. communica-
tion OK.
• t = No communication from the SFT
to the controller board.
• ?= Not valid answer from SFT.
• Number of SFTs found during
polling does not equal that required.
• SFT is showing an incorrect status.
• The KCM CPU did not find a motor
drive on the internal channel on
power-up.
• The KCM CPU lost the motor drive
on the internal channel while in
operation.
• Motor drive has lost communication
with the KCM CPU and then turns off
all digital outputs and shuts of drive
power.
• Drive temperature has been
exceeded > 75 deg C. Drive stops.
• No speed feedback signal is present
when motor is asked to run.
• Speed deviation from target >
rpm
• Wrong motor voltage programmed.
Remedy
 Locate which SFT has failed on the
<SFTs> line in the <SCALE>
Menu, <SFT> sub-menu.
 Check <SFT REQUIRED> number
is valid. See <SCALE> menu,
<SFT> sub-menu.
 Check for all SFTs being
operational.
 Replace SFT if problem persists.
 Check drive pcb LEDs for correct
function.
 Check Internal channel
connections.
 Replace drive or CPU pcb.
 Check drive pcb LEDs for correct
function.
 Check Internal channel
connections.
 Replace drive or CPU pcb.
 Check Internal channel
connections.
 Replace drive or CPU pcb.
 Reduce operating temperature
 Check speed pick-up for operation
and replace if necessary.

 Check speed pick-up wiring and
5
power connections.
 Check programming.
 Replace drive.
 Check motor.
Docu-No.: 0590020601-EN Rev. 1.6.0