User`s manual
9-11
9
Troubleshooting
9. Troubleshooting
Alarm
No.
Alarm name Possible cause Checkpoint Action Reset
E85
Overspeed
error
Speed command input
setting is wrong.
Check the setting. Correct the input setting.
C
Control gain does not
match.
Adjust the control gain.
Torque limiter is too
low.
Correct (increase) the
torque limiter correctly.
Overspeed error
detection level setting
is too low.
Set the overspeed error
detection level correctly
(increase).
Malfunction caused by
noise
• Check if there is any noise
source nearby.
• Check the routing of the
cable, connectors, shield
wire, and ground wire.
• Isolate the noise source
away from the drive.
• Strengthen the shielding
and grounding.
• Isolate the position
sensor cable away from
the power cable.
A
Moment of load inertia
is too heavy.
Check if overshooting has
occurred.
Reduce the load.
Wrong motor cable
connection
Check the connection. Correct the connection.
Position sensor failure While rotating the motor
shaft, check if the display
on the present position
monitor d-08 changes
sequentially.
If the sensor is defective,
contact us for repair.
C
E88
Drive range
error
• Pulse train position
command was
mistakenly input.
• Origin position is
wrong.
• Operated outside the
drive range.
Check the master control
unit.
After removing the cause
of trouble, clear the
tripped alarm and restart
operation. A
Needs larger operating
margin outside the
drive range
Check if a load moved the
robot near the drive range
limit.
• Review the setting
outside the drive range.
• Adjust or remove the
load so that it will not
move the robot.
C
Electronic gear setting
is incorrect.
Check the control device. Correct the setting.
Torque limiter is too
low.
Control gain does not
match.
Adjust the control gain.
Letters in the Reset column:
A: Shut off the power to the robot driver, perform troubleshooting, replace or repair defective parts.
B: After the robot stops, wait until the robot driver cools. Then short RS to P24, and perform troubleshooting.
C: After the robot stops, short RS to P24, and perform troubleshooting or shut off the power.