Omron CS1W-MCH71 -, Operation Manual

Page: 674 / 717

629
Troubleshooting
Section 11-1
No. Problem Probable causes Item to check Remedy
1 The CPU Unit’s
RUN indicator
does not light
when the power
is turned ON. Power supply lines are
wired incorrectly. Check the power supply wiring. Correct the power supply wiring.
2 The power supply voltage
is low. Check the power supply. Check the power supply capac-
ity and correct the power supply.
3 An internal fuse has blown. Check the fuses. Replace the fuse and determine
what caused it to blow. (Refer to
the troubleshooting section in
the applicable CPU Unit opera-
tion manual).
4 The power supply is defec-
tive. Check the power supply. Replace the power supply.
5 Only the MC
Unit’s Run indi-
cator fails to light
when the power
is turned ON. The power supply capacity
is insufficient. Add up the power supply capac-
ity for all of the Units mounted to
the same Backplane, including
the CPU Unit, and compare that
to the power supply capacity of
the Power Supply Unit. If the
combined capacity of the Units
is greater than that of the power
Supply Unit, then they cannot
be properly used. • Increase the power supply
capacity.
• Change the configuration so
that the power supply capacity
at the Backplane is not
exceeded.
6 The MC Unit is defective. Replace the MC Unit.
7 Servo cannot be
locked. The MC Unit is not operat-
ing. Is the RUN indicator lit? Check No.5.
8 Commands cannot be
received from the ladder
program because the MC
Unit’s operation mode is in
the tool mode. Check the operation mode
using the Support Tool. Set the mode to RUN mode or
CPU mode.
9 Another axis control bit is
ON at the same time. • Check whether another axis
control bit is ON at the same
time.
• Try executing Servo Lock using
the Support Tool.
Turn OFF the other axis control
bit and turn ON the bit [Servo
Lock]. (Change the ladder pro-
gram.)
10 The MC Unit is defective. Replace the MC Unit
11 The motor is not
turning. The servo is not locked. • Check whether the Servo
Driver is operating.
• Check the MC Unit axis status
to see whether servo is locked.
Execute Servo Lock and then
turn the motor.
(Change the ladder program.)
12 The wiring is incorrect
between the MC Unit and
the Servo Driver. • Check the wiring with a tester.
• Change the connecting cables. Correct the wiring.
13 A run prohibit input, such
as POT or NOT, of W-
series Servo Driver is
enabled (OFF with default
setting) (when Cn-01 bits 2
and 3 are 0). Check the run prohibit inputs
with the Support Tool. • Turn OFF the Servo Driver run
prohibit input.
• Disable (ON with default set-
ting) the Servo Driver run pro-
hibit input.
14 The Servo Driver is in the
internally set speed control
mode (and is not receiving
MC Unit speed reference). Check the Servo Driver setting. Correct the Servo Driver setting.
15 A Servo Driver alarm has
occurred. Check the contents of the Servo
Driver alarm. If there is an alarm, follow the
instructions.
16 The mechanical axis is
locked. Check whether there is a
mechanical limit or lock in effect. Manually release the mechani-
cal lock.
17 The MC Unit is defective. Replace the MC Unit.