122
Handling Errors and Alarms Section 3-8
ERC Indicator and RUN Indicator: Lit, ADJ Indicator: Flashing
This alarm will occur in the case of incorrect operation while in the adjustment
mode. In adjustment mode, the Adjustment Mode ON Flag will turn ON in bit
15 of CIO word n+9.
Note 1. When a PLC error occurs in the adjustment mode, the Unit will stop oper-
ating. (The input values immediately prior to the error are held.)
2. The operating mode can be set either with the DIP switch or with bits 00 to
07 of D (m+18).
ERC Indicator: Lit, RUN Indicator: Not Lit
The ERC indicator will be lit when the initial settings for the Analog Input Unit
are not set correctly. The alarm flags for the following errors will turn ON in
CIO word n+9. These alarm flags will turn OFF when the error is cleared and
the Unit is restarted, or the Special I/O Unit Restart Bit is turned ON and then
OFF again.
RUN
ERC
: Lit
ADJ
ERH
: Flashing
: Not lit
Word n + 9 Alarm flag Error contents Input status Countermeasure
Bit 12 (Adjustment
mode)
Input Value
Adjustment
Range
Exceeded
In adjustment mode, offset or
gain cannot be adjusted
because input value is out of the
permissible range for adjust-
ment.
Conversion data
corresponding
to the input sig-
nal is monitored
in word n+8.
If making the adjustment by
means of a connected input
device, first adjust the input
device before adjusting the Ana-
log Input Unit.
Bit 13 (Adjustment
mode)
Input Number
Setting Error
In adjustment mode, adjust-
ment cannot be performed
because the specified input
number is not set for use or
because the wrong input num-
ber is specified.
Holds the values
immediately
prior to the error.
No data is
changed.
Check whether the word n input
number to be adjusted is set
from 21 to 28 (21 to 24 for
CJ1W-AD041-V1.)
Check whether the input number
to be adjusted is set for use by
means of the DM setting.
Bit 15 only ON (Adjustment
Mode)
PLC Error (See
note 1.)
The PLC is in either MONITOR
or RUN mode while the Analog
Input Unit is operating in adjust-
ment mode.
Holds the values
immediately
prior to the error.
No data is
changed.
Switch the front panel DIP
switch pin to OFF. Restart the
Unit in normal mode. (See note
2.)
RUN
ERC
ERH
: Lit
: Not lit
Word n + 9 Alarm flag Error contents Input status Countermeasure
Bit 11 Mean Value
Processing Set-
ting Error
The wrong number of samplings
has been specified for mean
processing.
Conversion
does not start
and data
becomes 0000.
Specify a number from 0000 to
0006.
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