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44
Indicators and Error Flowchart
Section 5-1
5-1
Indicators and Error Flowchart
Indicators
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.
5-2
Errors Detected by the Universal Input Unit
RUN
ERC
ERH
AD04U
B1
A1
Front panel of Unit
Indicator
Meaning
Indicator
Operating status
RUN (green)
Operating
Lit
Operating normally.
Not lit
Unit has stopped exchanging data with the CPU Unit.
ERC (red)
Error detected
by Unit
Lit
Alarm has occurred (such as disconnection detection) or initial settings
are incorrect.
Not lit
Operating normally.
ERH (red)
Error in the
CPU Unit
Lit
Error has occurred during data exchange with the CPU Unit.
Not lit
Operating normally.
Indicator
Contents
Probable cause
Unit operation
Remedy
ERC
(red)
RUN
(green)
Lit
Lit
Error in continuously
refreshed area
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 Unit will continue
operating with the orig-
inal continuously
refreshed area data.
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.)
Sensor error
The input signal exceeded
the upper or lower limit of
the set input range by more
than 20
°
C or 20
°
F.
Check the input sensor
to see if it is operating
correctly.
Check the set input
range to see if it is suit-
able.
The error will be
cleared automatically
when the input signal
returns to within 20
°
C
or 20
°
F of the set
range.
Not lit
Error in continuously
refreshed area, initial
settings area, or Expan-
sion Setting Area set-
tings
An out-of-range setting was
set in the continuously
refreshed area or initial set-
tings area (in the allocated
DM Area words).
The Unit will not start
up.
Restore the set value
to within the allowable
range, and then either
turn the power supply
OFF and ON or restart
the Unit.
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...