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32
Nomenclature and Functions
Section 3-1
3-1
Nomenclature and Functions
3-1-1
Nomenclature
LED Indicators
Note
When the ERC or ERH indicator is lit, these four indicators show the internal
error status.
Unit Number Setting
Switch
Several MC Units can be mounted on one CS/CJ series PLC.
It is necessary to set the unit numbers to identify these units when several MC
or CPU Bus Units are mounted.
LED Indicators
T.B connector,
SSI connector
(Cannot be used)
I/O connector
MECHATROLINK-II
connector
UNIT No.
Setting switch
Name
Color
Status
Content
RUN
(RUN)
Green
Lit
Motion Control Unit is operating normally.
Not lit
Not recognized by PLC, or MC Unit is broken.
ERC
(MC Unit Error)
Red
Lit
An error has occurred in the MC Unit.
Not lit
MC Unit is operating normally.
ERH
(CPU Unit Error)
Red
Lit
An error has occurred in the CPU Unit.
Not lit
CPU Unit is operating normally.
ER1 (See note.)
(Internal error status)
Yellow
Lit
An internal error has occurred.
Not lit
MC Unit is operating normally.
ER2 (See note.)
(Internal error status)
Yellow
Lit
An internal error has occurred.
Not lit
MC Unit is operating normally.
ER3 (See note.)
(Internal error status)
Yellow
Lit
An internal error has occurred.
Not lit
MC Unit is operating normally.
ER4 (See note.)
(Internal error status)
Yellow
Lit
An internal error has occurred.
Not lit
MC Unit is operating normally.
SSI Yellow
Lit
Not
used.
Not lit
Not used.
MLK
(MECHATROLINK-II)
Yellow
Lit
MLK is operating normally.
Not lit
An error has occurred in the MLK.
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