-B281*B02U*CC20 11/17-
I/O0
I/O1
I/O0
ALM
I/O1
LINK
LINK (Green)
I/O0 (Orange)
I/O1 (Orange)
ALM (Red)
ALM
LINK
I/O
If an error is indicated, identify a
cause of the error by checking
lit/flashing status with the table on
the left, and eliminate the cause of
the error.
Once the cause of the error is
eliminated, the error indication will
be automatically reset.
LED indicators
Setting port
LED name
*
1 This indication appears when the use of the single unit simplified replacement function fails.
(This operation occurs on the S/W version “B” or later version.)
*
2 This error is detected by executing automatic address recognition with master unit.
*
3 For S/W version “B” or later version: This indication appears when transmission signal and
power supply are normally connected, and the unit is set to the factory-set address.
For S/W version “A” or 3-digit lot No.: This condition is detected when the master unit
executes automatic address recognition.
*
4 This unit does not operate with the factory-set address.
LINK
(Green)
ALM
(Red)
Flashing
Lit
Unlit
Flashing
Lit
Lit
Unlit
Unlit
Display status
Alternate flashing
Model mismatching error
*
1
Description
I/O disconnection, I/O short-circuit
No ALM available
Transmission signal received
Slave unit voltage drop
Model mismatching error
*
1
Transmission signal error
Model mismatching error
*
1
ID duplicated
*
2
or ID unregistered
*
3
No transmission signal (disconnection and
reverse connection of DP and DN lines included)
[Monitor Display]
I/O
(Orange)
LINK
ALM
LINK
ALM
LINK
ALM
ON
*
4
OFF
LINK
ALM
When I/O flashes in synchronization with LINK
while ALM is lit, it indicates I/O disconnection.
