Omron SMARTSTEP R7D-AP Series User Manual page 227

Troubleshooting
Symptom Probable cause
The Servomotor The RUN signal is OFF.
does not oper-
ate even when a
The deviation counter
command is
reset input (ECRST) is
given.
ON.
An error occurred with
the RESET (alarm reset)
signal ON.
Function switch settings
are incorrect.
Function switch 3 (com-
mand pulse input) setting
is incorrect. (When func-
tion switches are being
used.)
Pn200.0 (command
pulse mode) setting is
incorrect. (When param-
eter setting is being
used.)
Servomotor power lines
are incorrectly wired.
Command pulse is incor-
rectly wired.
The Servomotor The Servomotor power
operates lines or encoder lines are
momentarily, but wired incorrectly.
then it does not
The command pulse is
operate.
more than 250 kpps.
Servomotor The Servomotor power
operation is lines or encoder lines are
unstable. wired incorrectly.
There are eccentricities
or looseness in the cou-
pling connecting the Ser-
vomotor shaft and the
mechanical system, or
there are load torque
fluctuations according to
how the pulley gears are
engaging.
Gain is wrong.
Items to check
Check the RUN signal's ON and
OFF operation.
Check the ON/OFF status of the
ECRST signal.
Pn200.1 (deviation counter reset)
setting is incorrect.
Check the ON/OFF status of the
RESET signal.
Check function switch 6 (switch/
parameter setting).
Check the Controller's command
pulse type and the Servo Driver's
command pulse mode.
Check the Controller's command
pulse type and the Servo Driver's
command pulse mode.
Check Servomotor power lines.
Check the command pulse wiring. Rewire correctly.
Check the command pulse volt-
age.
Check the Servomotor power line
U, V, and W phases, and the
encoder line wiring.
Check the Controller's command
pulse frequency.
Check the Servomotor power line
U, V, and W phases, and the
encoder line wiring.
Check the machinery.
Try operating the Servomotor with-
out a load.
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Chapter 5
Countermeasures
Input the RUN signal.
Correct the wiring.
Turn OFF the ECRST sig-
nal.
Correct the wiring.
Reset Pn200.1 to match the
Controller.
Turn the RESET signal OFF
and take measures accord-
ing to the alarm display.
If using function switch 3
(command pulse input set-
ting), turn OFF switch 6.
If using parameter Pn200.0,
turn ON switch 6.
Set the mode to match the
Controller's command pulse
type.
Set the mode to match the
Controller's command pulse
type.
Rewire correctly.
Connect a resistor match-
ing the voltage.
Correct the wiring.
Reset the command pulse
to 250 kpps max.
Correct the wiring.
Adjust the machinery.
Use autotuning.
Adjust the gain manually.
5-13