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Handling Errors and Alarms Section 5-8
5-8-2 Alarms Occurring at the Analog Output Unit
When an alarm occurs at the Analog Output Unit, the ERC indicator lights and
the Alarm Flags are stored in bits 08 to 15 of CIO word n+9.
For the CIO word addresses, n = CIO 2000 + (unit number x 10).
ERC and RUN Indicators: Lit
The ERC and RUN indicators will be lit when an error occurs while the Unit is
operating normally. The following alarm flags will turn ON in CIO word n+9.
These alarm flags will turn OFF automatically when the error is cleared.
Note 1. n = CIO 2000 + (unit number
× 10)
2. Only bits 00 and 01 are used for the CJ1W-DA021 and only bits 00 to 03
are used for the CJ1-DA041.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Bit
Word n+9
Output Setting Error Flags
Alarm Flags
(Outputs are made only to bits 00
and 01 for the CJ1W-DA021, and to
bits 00 to 03 for the CJ1W-DA041.)
(See 5-6-6 Output Setting Errors.)
RUN
ERC
ERH
: Lit
: Not lit
Word n + 9 Alarm flag Error contents Output status Countermeasure
Bits 00 to 07
(See note 2.)
Output Set
Value Error
The output setting range has
been exceeded.
Output value set
by output hold
function.
Correct the set value.
Bit 14 (Adjustment
mode)
EEPROM Writ-
ing Error
An EEPROM writing error has
occurred while in adjustment
mode.
Holds the out-
put status imme-
diately prior to
the error.
Turn the Set Bit OFF, ON, and
OFF again.
If the error persists even after
the reset, replace the Analog
Output Unit.
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