Omron CS1W-AD041-V1 - 6-10-3 Errors in the CPU Unit

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Handling Errors and Alarms Section 6-10
the Unit is restarted, or the Special I/O Unit Restart Bit is turned ON and then
OFF again.
6-10-3 Errors in the CPU Unit
When errors occur in the CPU Unit or I/O bus, and I/O refresh with the Special
I/O Unit is not performed correctly resulting in the Analog I/O Unit malfunction-
ing, the ERH indicator will be lit.
ERH and RUN Indicators: Lit
The ERH and RUN indicators will be lit if an error occurs in the I/O bus caus-
ing a WDT (watchdog timer) error in the CPU Unit, resulting in incorrect I/O
refresh with the Analog I/O Unit.
Turn ON the power supply again or restart the system.
For further details, refer to CS-series CS1G/H-CPU@@-EV1, CS1G/H-
CPU@@H Programmable Controllers Operation Manual(W339).
Note No error will be detected by the CPU Unit or displayed on the Programming
Console, because the CPU Unit is continuing operation.
Word n + 9 Alarm flag Error contents I/O status Countermeasure
Bit 08 Ratio Conver-
sion Use Set-
ting Error
The I/O number for the ratio con-
version function has been set to
be not used.
Conversion
does not start
and data
becomes 0000.
Set the I/O number for use.
Bit 09 Ratio Set Value
Error
A number outside of the 0 to
9999 BCD range has been
specified for the ratio set value.
Specify a number from 0 to 9999
BCD.
Bit 10 Output Hold
Setting Error
The wrong output status for
when conversion is stopped has
been specified.
Specify a number from 0000 to
0002.
Bit 11 Mean Value
Processing Set-
ting Error
The wrong number of samplings
has been specified for mean
processing.
Specify a number from 0000 to
0006.
RUN
ERC
ERH
: Lit
: Not lit
Error Error contents Input condition Output condition
I/O bus error Error has occurred during
data exchange with the CPU
Unit.
Conversion data becomes
0000.
Depends on the output hold
function.
CPU Unit monitoring error
(see note)
No response from CPU Unit
during fixed period.
Maintains the condition exist-
ing before the error.
Maintains the condition exist-
ing before the error.
CPU Unit WDT error Error has been generated in
CPU Unit.
Changes to undefined state. Depends on the output hold
function.