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46
Errors Related to the CPU Unit
Section 5-3
5-3
Errors Related to the CPU Unit
5-4
Restarting Special I/O Units
To restore operation after the contents of the DM Area have been changed, or
after the cause of an error has been cleared, either turn ON the power supply
to the PLC or turn the Special I/O Unit Restart Bit ON and then OFF again.
• Special I/O Unit Restart Bit
ERH
LED
(red)
RUN
LED
(green)
Contents
Probable
cause
Error type
Detailed
cause
Input Unit
status
Remedy
Lit
Lit
Error in data
exchange with
the CPU Unit
During normal
operation, an
I/O bus error,
CPU Unit moni-
toring error, or
WDT error
occurred at the
CPU Unit.
I/O bus error
A data trans-
mission error
occurred
between the
CPU Unit and
the Universal
Input Unit.
Converted data
becomes 0000
hex.
Turn OFF the
power supply
and check the
installation con-
ditions and the
cable connec-
tions between
devices. Then
turn the power
back ON.
CPU Unit moni-
toring error
The CPU Unit
did not respond
within a fixed
period of time.
Maintains the
status existing
before the
error.
CPU Unit WDT
error
WDT error has
been generated
at CPU Unit.
Changes to
undefined
state.
In PROGRAM
Mode, turn the
power OFF and
then back ON.
Not lit
Error in Multi-
channel Ana-
log Input Unit’s
unit number or
mounting
Either the unit
number is set
incorrectly or
the Unit is
mounted incor-
rectly.
Duplicate Unit
Number
The same unit
number has
been assigned
to more than
one Unit or the
unit number
was set to a
value other
than 00 to 95.
Conversion
does not start.
Reset the unit
number so that
it will not dupli-
cate any other.
Special I/O Unit
Setting Error
A Universal
Input Units reg-
istered in the
I/O table is dif-
ferent from the
ones actually
mounted.
Check the
mounting posi-
tions, and
either mount
the Units
according to
the I/O table or
correct the I/O
table.
Fatal error at CPU Unit after turning ON the power supply
Take mea-
sures for CPU
fatal error.
Bits
Unit number
Bits
Unit number
Bits
Unit number
A502.00
Unit #0
A503.00
Unit #16
A504.00
Unit #32
A502.01
Unit #1
A503.01
Unit #17
A504.01
Unit #33
A502.02
Unit #2
A503.02
Unit #18
A504.02
Unit #34
A502.03
Unit #3
A503.03
Unit #19
A504.03
Unit #35
A502.04
Unit #4
A503.04
Unit #20
A504.04
Unit #36
A502.05
Unit #5
A503.05
Unit #21
A504.05
Unit #37
A502.06
Unit #6
A503.06
Unit #22
A504.06
Unit #38
A502.07
Unit #7
A503.07
Unit #23
A504.07
Unit #39
A502.08
Unit #8
A503.08
Unit #24
A504.08
Unit #40
Summary of Contents for SYSMAC CJ1W-AD04U
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 13: ...xiv...
Page 61: ...42 Expansion Setting Area Section 4 3...
Page 69: ...50 Dimensions Appendix A...