8. MAINTENANCE
8 - 12
Alarm Status
Segment LED
Display
Alarm Code
ALM8,4,2,1
Abbreviation
Alarm
Name
Alarm
Clear
Contents
1100 SE Velocity
control
error
Possible Velocity control is not functioning normally
Alarm code 0,1 indicates: when Func2/ bit7,6 =”0,0”, “0”= output open and “1”= output short.
Operating state when alarm occurred
POSSIBLE CAUSES
OPERATING STATE
1 2 3 4 5
When control power supply is turned on
○
Upon servo ON input
○
○
Upon command input
○ ○ ○
When motor is started or stopped
○
Corrective Measures
CAUSE CORRECTIVE MEASURES
1 Incorrect wiring of U, V, W phases between
amplifier and motor
Check and correct wiring.
2 Incorrect wiring of A, B phases between
INC-E and ABS-E encoder connection
Check and correct wiring.
3 Motor is vibrating (oscillating) Adjust servo parameter to stop vibration (oscillation).
4 Overshoot and/or undershoot is too large Use the analog monitor of the remote controller to
check the velocity
• Adjust servo parameter to reduce overshoot and/or
undershoot.
• Increase acceleration/deceleration command time.
Or, mask the alarm by setting Func2 of remote
controller.
4 Faulty servo amplifier control circuit Replace servo amplifier.
Velocity control error alarm is set to “not detecting” as standard, but can be change to
“detecting” by setting bit5 of Func2 to “0” when necessary.
This alarm may be detected during motor start or stop in cases where load inertia is high or
for applications with G-force axis. In these cases, set bit5 of Func2 to “1” for “not detecting”.
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