313
LED Error Indicators
Section 11-3
The status of the LED indicators on the front of the PCU can be used to diag-
nose errors as shown in the following table. The status of the indicators is as
follows:
❍
:ON
✩
:Flashing
●
:OFF
---: • When a data error or an external sensor input error occur, the indicator
for the corresponding axis will flash.
• In normal operation, the indicator will be lit during pulse output, and be
unlit while pulse output is stopped.
LED
Error
Cause
Remedy
R
U
N
E
R
C
E
R
H
S
E
N
S
D
A
T
A
X
Y
Z
U
● ● ● ● ● ● ● ● ●
PLC power supply
OFF
The PLC’s power supply is
OFF.
Turn ON the PLC’s power
supply.
Not mounted to
Backplane
The PCU is not mounted
securely to the PLC Back-
plane.
Mount the PCU to the Back-
plane securely.
Watchdog timer
error
The watchdog timer for the
PCU turned ON.
Mount the PCU to the Back-
plane securely and reset the
power supply.
CPU Unit power
interruption
An interruption in the power
supply was detected at the
CPU Unit.
Remove the cause of the
power interruption and reset
the power supply.
● ● ❍ ● ● ● ● ● ●
Setting error
The unit number set for the
PCU is outside the accept-
able range.
Set the unit number for each
of the Units to a setting
within the acceptable range,
reset the power supply, and
create an I/O table from the
CPU Unit.
The unit number set for the
PCU is the same as the unit
number set for another Unit
(unit number duplication).
Change the unit number set-
ting, reset the power supply,
and create an I/O table from
the CPU Unit.
I/O table has not been cre-
ated.
Create an I/O table from the
CPU Unit.
Communications with the
CPU Unit are not possible.
Mount the Unit to the Back-
plane securely.
● ❍ ● ● ● ● ● ● ●
PCU error
Unexpected operation
occurred at the PCU.
Replace the PCU.
● ❍ ❍ ● ● ● ● ● ●
Unit type error
There is a fault in a compo-
nent of an I/O card or bus
ASIC in the PCU.
Replace the PCU.
● ❍ ● ❍ ❍ ● ● ● ●
System software
error
The system software for the
Unit has been destroyed.
Replace the PCU.
● ❍ ● ❍ ❍ ❍ ● ● ●
RAM error
There is a fault in the PCU’s
RAM.
Replace the PCU.
Summary of Contents for CS1W-213 - REV 02-2008
Page 2: ...CS1W NC113 213 413 133 233 433 Position Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 13: ...xiv ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 43: ...18 Basic Operational Flow Section 2 1 ...
Page 87: ...62 Servo Relay Unit Section 3 7 ...
Page 199: ...174 Z phase Margin Section 6 8 ...
Page 217: ...192 Sample Program Section 7 7 ...
Page 285: ...260 Easy Backup Function Ver 2 0 or later Section 9 11 ...
Page 377: ...352 Common Parameter Area Appendix C ...