Omron R88M-1M Series User Manual page 775

Symptom
The Servo locks but The host controller does not
the Servomotor does give a command.
not rotate.
The Servo Drive received a
command but it is not
accepted.
It is hard to determine if the
Servomotor is rotating.
The holding brake is operating.
The torque limits set in the
Positive torque limit value
(60E0 hex) and the Negative
torque limit value (60E1 hex)
are too small.
Positive Drive Prohibition Input
(POT) or Negative Drive Prohi-
bition Input (NOT) is OFF.
The motor power cable is wired
incorrectly.
The encoder cable is wired
incorrectly.
Power is not supplied.
The Servo Drive is broken
down.
The Servomotor oper- The position commands given
ates momentarily, but are too little.
then it does not oper-
ate after that.
The motor power cable is wired
incorrectly.
The encoder cable is wired
incorrectly.
The Servomotor There are inputs of small val-
rotates without a com- ues in velocity control mode.
mand.
The motor power cable is wired
incorrectly.
When the runaway The Servomotor power cable is
detection function is
wired incorrectly, and condi-
enabled, the
tions under which the runaway
Servomotor rotates
detection function cannot work
without a command.
are satisfied.
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User's Manual (I586)
Probable cause
For a position command, check
to see if the speed and position
are set to 0.
Check to see if the Servo Drive
retains the object value for two
communications cycles or more
in Profile position mode (pp).
Check to see if the velocity
command given by the host
controller is too small.
Check the Brake Interlock Out-
put (BKIR) signal and the +24
VDC power supply.
Check to see if the torque limits
in objects 60E0 hex and 60E1
hex are set to a value close to
0.
Check the ON/OFF state of the
POT and NOT signals from the
Sysmac Studio.
Check the wiring.
Check the power supply and
the 7-segment display.
Check the voltage between the
power terminals.
---
Check the position data and the
electronic gear ratio at the host
controller.
Check the wiring of the motor
power cable's phases U, V, and
W.
Check the encoder cable's wir-
ing.
Check if there is an input in
velocity control mode.
Check the wiring.
Check the wiring.
Check items
Enter position and speed data.
Start the Servomotor.
Set the Servo Drive so that it
retains the object value for two
communications cycles or
more.
Check the velocity command
from the host controller.
Check to see if the holding
brake on a Servomotor with
brake is released when the
Servo is locked.
Set the maximum torque that
you use for each of these
objects.
• Turn ON the POT and NOT
signals.
• Disable them in the settings
when the POT and NOT sig-
nals are not used.
Wire correctly.
Turn ON the power.
Wire the power-ON circuit cor-
rectly.
Replace the Servo Drive.
Set the correct data.
Wire correctly.
Wire correctly.
Set the velocity command to 0.
Alternatively, change the mode
to position control mode.
Wire correctly.
Wire correctly.
12 Troubleshooting
Measures
12 - 43
12