Omron OMNUC W Series User Manual page 374

Troubleshooting
5-3-2 Troubleshooting by Means of Operating Status
Symptom
The power sup- Power supply lines are in-
ply indicator correctly wired.
(POWER) does
not light even
when the power
supply is turned
ON.
The Servomo- The RUN signal is OFF.
tor does not op-
erate even
when a com- h
The POT and NOT signals
mand is given.
are OFF (except when
(No alarm is
Pn50A.3 and Pn50b.0 are
output.)
set to 8).
The control mode is not
right.
The deviation counter reset
input (ECRST) is ON.
An error occurred with the
RESET (alarm reset) signal
ON.
Pn200.0 (Command pulse
mode) setting is incorrect.
The speed command (REF)
voltage is 0 V.
The PLOCK signal is ON.
SEN (sensor ON) is turned
OFF (when using an abso-
lute encoder).
The Servomo- The Servomotor power lines
tor operates or encoder lines are wired
momentarily, incorrectly.
but then it does
not operate.
5-16
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Probable cause
Check the power supply
voltage.
Check the power supply
lines.
Check the RUN signal's ON
and OFF by means of the
monitor mode (Un005).
Check whether POT and
NOT are displayed in status
display mode.
Check Pn000.1 (control
mode selection)
With monitor mode, check
the ON/OFF status of the
ECRST signal (Un005).
Pn200.1 (Deviation counter
reset) setting is incorrect.
Check the RESET signal's
ON and OFF by means of
the monitor mode.
Check the Controller's com-
mand pulse type and the
Servo Driver's command
pulse mode.
Check the speed command
by means of the monitor
mode (Un001).
Check the speed command
voltage.
Check the PLOCK signal by
means of the monitor mode
(internal status bit).
Check whether the SEN sig-
nal is ON or OFF using
monitor mode.
Check the Servomotor pow-
er line U, V, and W phases,
and the encoder line wiring.
Items to check
Correct the power supply.
Correct the wiring.
Input the RUN signal.
Correct the wiring.
Turn ON the POT and NOT
signals.
If POT and NOT are not be-
ing used, set to "Always
OFF" (Pn50A.3 and
Pn50b.0 = 8).
Set the control mode to
match the command type.
Turn OFF the ECRST sig-
nal.
Correct the wiring.
Reset Pn200.1 to match the
Controller.
Turn the RESET signal OFF
and take measures
according to the alarm
display.
Set the mode to match the
Controller's command pulse
type.
Correct the wiring.
Turn the PLOCK signal
OFF.
Check the Pn501 (Position
lock rotation speed) value.
Turn ON the SEN signal.
Correct the wiring.
Chapter 5
Countermeasures Control
All modes
All modes
All modes
All modes
Position
Position
All modes
Position
Speed
Speed
All modes
All modes
mode