Mitsubishi MELSEC-A Series Reference Manual page 197

7. DATA LINK SETTINGS
(4) Assignment of inputs (X) and outputs (Y)
(a) Input and output range can be used for data link by master station
The master station uses the X/Y0 to X/Y14F range as I/O of host station. For the
data link, the X/Y150 to X/Y7FF range can be used.
(b) Assignment of remote I/O stations
1) Assignment of remote I/O station No.1
Assignment range of inputs (X): X0 to 8F
Assignment range of outputs (Y): Y30 to 10F
2) Assignment of remote I/O station No.4
Assignment range of inputs (X): X0 to BF
Assignment range of outputs (Y): Y80 to 19F
(c) Assignment of local stations
In this example, inputs (X) and outputs (Y) are not required because there is
empty area in the link relay (B) assignment. However, to simplify the explanation,
128 input (X) points and 128 output (Y) points are assigned.
1) Assignment of local station No.2
Local station No.2 uses the X/Y0 to 17F range as I/O station of host station.
For the data link, the X/Y180 to 7FF range can be used.
2) Assignment of local station No.3
Local station No.3 uses the X/Y0 to 14F range as I/O station for host station.
For the data link, the X/Y150 to 7FF range can be used.
Fig 7.29 Input (X) and output (Y) assignment example
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