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3 System Configuration
3.4 Assignment of channels
20
FX3U-CF-ADP User's Manual
2. FX3UC(D, DSS) PLC
3.4 Assignment of channels
The CF-ADP is handled in the same way as communication expansion boards and communication special
adapters for PLCs. Its channel number ("ch1" or "ch2") is assigned automatically in the order of the position
from the main unit. This channel number is used in applied instructions for the CF-ADP.
The channel number is assigned as shown below.
1. FX3U/FX3UC-32MT-LT(-2) PLC
• When using channel 1 (ch1)
• When using channel 2 (ch2)
Caution on using the CF-ADP
The CF-ADP is handled in the same way as communication expansion boards and communication special
adapters, and occupies one communication channel.
Other
special adapters
Main unit
FX
3U
-CF-ADP
FX
3U
, FX
3UC
-32MT-LT(-2)
Main unit
FX
3U
-CNV-BDCF-ADP
ch1
Analog
special adapter
Communication
special adapter
(ch2)
Analog
special adapter
FX
3U
, FX
3UC
-32MT-LT(-2)
Main unit
Communication
expansion
board
CF-ADP
ch2 (ch1)
Analog
special adapter
Analog
special adapter