![background image](http://html1.mh-extra.com/html/omron/omnuc-h-series/omnuc-h-series_technical-manual_744166030.webp)
3-3
Main Circuit Overcurrent
If any of the following errors result, turn off the Servo Driver immediately.
Do not turn on the Servo Driver until the causes are checked and countermeasures are taken.
Do not replace the Servo Driver or motor without finding out the cause of the error.
The built-in circuitry of the Servo Driver may be completely damaged if the Servo Driver is turned on without
taking proper countermeasures.
Do not replace any Unit without checking the causes and taking countermeasures, otherwise the Unit may
be damaged.
·
These errors will result if there is an excessive current flow to the main circuitry of the Servo Driver.
·
Excessive current may flow if a ground fault or short-circuit results on the lines between the capacitor of
the main circuitry and motor.
Alarm Indication
U Series: A. 10
H Series: E4
M Series: A. L-1
R Series: OC
Probable cause
Item to check
Countermeasure
The power cable has been
short-circuited.
·
Phase lines are short-circuited.
* Check the resistance of the
cable alone.
·
Replace the cable.
·
Repair the cable.
The power cable had a ground
fault.
·
A power line and the FG (frame
ground) are short-circuited.
* Check the resistance of the
cable alone.
·
Replace the cable.
·
Repair the cable.
The motor has burned out.
·
The motor gives off a burning
smell.
·
The phase-to-phase resistance
of the motor is different from the
coil resistance.
*1. Check the specifications of
the motor.
*2. If the coil resistance is
unknown, be sure that all
phase-to-phase resistance
readings are the same. If
not, the motor must have
burned out.
·
Replace the motor.
The transistor of the main circuitry
has burned out.
·
The resistance between each
combination of these terminals is
100
W
maximum.
P (PA) - A (U) N (NA) - A (U)
P (PA) - B (V)
N (NA) - B (V)
P (PA) - C (W) N (NA) - C (W)
* Check the resistance twice by
interchanging the probes of the
multimeter. If each resistance
reading is 100
W
max., the
transistor is damaged.
·
Replace the Servo Driver.
Note
It is unlikely that only the Servo Driver is damaged. If the Servo Driver is damaged, carefully check
whether other parts or devices are damaged.
Servo Driver Errors
Chapter 3
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]