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APPENDICES
2.6 LED Indications when Errors Occur at the PCPU
"ERREOR"LED
!
:Lit
":Not lit
!
!
!
!
!
!
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For servo error
!
For warning
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When the errors listed below occur, they are indicated by the "ERROR" LED on the
front panel of the A172SHCPUN, and the LED on the front panel of the
A171SHCPUN. The error message can be read on the error list monitor screen of
the peripheral device.
For details on the operating procedure, refer to the operating manual for the
peripheral device.
Table 2.16 LED Indications When Errors Occur at PCPU
Error Cause
• The slot set in the "system settings" has nothing mounted
in it, or has a different module mounted in it.
• Axis number settings are duplicated in the "system
settings".
• Not even one axis No. has been set in the "system
settings".
• No system setting data has been written.
• The system setting data has been written without
performing a relative check. Or it has been written
although an error occurred in the relative check.
• There is no battery in the memory cassette.
• An axis No. that exceeds the "number of controlled axes"
setting in the "system settings" has been set.
• The total number of I/O points of the PC I/O modules set in
motion slots in the "system settings" exceeds 256.
• The amplifier type set in the "system settings" (MR-H-
BN/MR-J2S-B/MR-J2-B) disagrees with the amplifier type
actually installed.
• Occurrence of a servo error or servo warming
• When using the LED does not light for a warning.
• Detection of motion slot module abnormality (module
comes out, or is loose, during operation)
• Occurrence of a PCPU WDT error
REMARK
Numerical values corresponding to axis numbers are entered for "n" in Table
2.16 (error set device).
<A172SHCPUN>
Axis No.
search engine
Error Check Timing
When power
switched ON
On resetting with the
RESET key switch
When the servo
amplifier power is
turned ON
At all times
n
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
APP − 27
Operation when
Error Set Device
Error Occurs
• Start is disabled.
• System setting
error flag (M2041)
ON
• Servo operation
does not start for
the relevant axis
only. Starting of
this axis is
disabled.
• In the case of MR-
• Servo error
H-BN, MR-J2S-B
detection flag
and MR-J2-B
(M1608+20n) ON
• Servo error code
axes, only the
relevant axis
device
enters the servo
(D808+20n) set
OFF status.
• Motion slot module
error detection flag
(M2047) ON
• PCPU WDT error
immediate stop of all
axes
flag (M9073) ON
• PCPU WDT error
cause (D9184) set
<A171SHCPUN>
Axis No.
n
1
0
2
1
3
2
4
3
Corrective Action
• Set the "system
settings" correctly
in accordance with
the modules
actually mounted,
then reset with the
RESET key switch.
• Ellminate the error
cause and perform
a servo error reset.
After servo error
reset. If the servo
status is normal at
all axes, the LED
display is cleared.
• Switch off the
power and mount
the module
correctly.
• See Section 3.5.2.
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