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16
Nomenclature and Functions
Section 2-3
Indicators
The indicators show the operating status of the Unit. The following table
shows the meanings of the indicators.
Unit Number Switch
The CPU Unit and Universal Input Unit exchange data via the Special I/O Unit
Area and the Special I/O Unit words in the DM Area.
The Special I/O Unit Area word addresses and Special I/O Unit word
addresses in the DM Area that each Universal Input Unit occupies are set by
the unit number switch on the front panel of the Unit. Refer to page 26 for
details on the unit number setting.
Note
If two or more Special I/O Units are assigned the same unit number, a “UNIT
No. DPL ERR” error (in the Programming Console) will be generated
(A401.13 will turn ON) and the PLC will not operate.
The fatal error code, error contents, and time of occurrence are stored as an
error record in the Auxiliary Area of the CPU Unit.
LED
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
An alarm occurred (such as detection of a sensor error) or
there is an incorrect setting in the DM Area settings.
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.
MACH
No.
×
10
0
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
×
10
1
Unit number
setting switches
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...