Indicators And Error Flowchart - Omron SYSMAC CJ1W-AD04U Operation Manual

Indicators and Error Flowchart

5-1 Indicators and Error Flowchart
Indicators
Indicator Meaning
RUN (green) Operating
ERC (red) Error detected
by Unit
ERH (red) Error in the
CPU Unit
5-2 Errors Detected by the Universal Input Unit
Indicator
ERC RUN
(red) (green)
Lit Lit Error in continuously
refreshed area
Sensor error
Not lit Error in continuously
refreshed area, initial
settings area, or Expan-
sion Setting Area set-
tings
44
If an alarm or error occurs in the Universal Input Unit, the ERC or ERH indica-
tors on the front panel of the Unit will light.
Indicator
Lit Operating normally.
Not lit Unit has stopped exchanging data with the CPU Unit.
Lit Alarm has occurred (such as disconnection detection) or initial settings
are incorrect.
Not lit Operating normally.
Lit Error has occurred during data exchange with the CPU Unit.
Not lit Operating normally.
Contents Probable cause
An out-of-range setting was
set in the continuously
refreshed area (in the allo-
cated DM Area words) after
the Input Unit started oper-
ating normally.
The input signal exceeded
the upper or lower limit of
the set input range by more
than 20°C or 20°F.
An out-of-range setting was
set in the continuously
refreshed area or initial set-
tings area (in the allocated
DM Area words).
Front panel of Unit
AD04U
RUN
ERC
ERH
B1
Operating status
Unit operation
The Unit will continue
operating with the orig-
inal continuously
refreshed area data.
Check the input sensor
to see if it is operating
correctly.
Check the set input
range to see if it is suit-
able.
The Unit will not start
up.
Section 5-1
A1
Remedy
Restore the set value
to within the allowable
range. (There is no
need to turn the power
supply OFF and ON or
to restart the Unit.)
The error will be
cleared automatically
when the input signal
returns to within 20°C
or 20°F of the set
range.
Restore the set value
to within the allowable
range, and then either
turn the power supply
OFF and ON or restart
the Unit.