User`s manual

Troubleshooting
9
9-6
9. Troubleshooting
Alarm
No.
Alarm name Possible cause Checkpoint Action Reset
E07
Main power
overvoltage
Regenerative
resistance is large.
Check the regenerative
resistance.
Reduce the regenerative
resistance to the
minimum (R
BR
min). (Refer
to (3) of section 3.2.2,
"Main circuit wiring".
A
Deceleration time is too
short.
Check the deceleration
time.
Increase the deceleration
time.
C
Robot was put into
hunting and momentary
regeneration occurred.
Check if the robot was
placed in hunting (abnormal
noise).
Adjust the position/speed
control gain correctly.
Regenerative resistor
is not connected, or is
open or damaged.
Check the regenerative
resistor connection or the
regenerative resistance.
• Connect the
regenerative resistor
correctly.
• Replace the
regenerative resistor.
A
Received power voltage
is too high or a ground
fault has occurred.
• Check the power supply
voltage.
• Check the connection.
• Reduce the voltage.
• Correct the connection.
E08
Memory
error
Sum error in the
internal EEPROM of
robot driver
Check if all settings for the
robot driver are correct.
• After clearing the
tripped alarm, return the
parameters to the
factory settings, and
then restart operation.
• If defective, replace or
repair it.
C
An EEPROM write or
read error was caused
by noise.
• Check if any noise source
exists near the robot
driver.
• Check if the set values
are correct.
• Remove the noise
source.
• After clearing the
tripped alarm, return the
parameters to the
factory settings, and
then restart operation.
A
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.