Mitsubishi MELSEC-A Series Reference Manual page 166

7. DATA LINK SETTINGS
(3) Assignment of inputs (X) and outputs (Y)
(a) The range used for data link by the master station
The master station uses the X/Y0 to X/Y14F range as inputs and outputs of host
station.
The X/Y150 to X/Y7FF range can be used for the data link.
(b) Assignment for local stations
In this example, inputs (X) and outputs (Y) are not required because there is an
empty area in the link relay (B) assignment. However, to explain the assignment
example of local station, 128 input (X) points and 128 output (Y) points have
been assigned.
1) Assignment of local station No.1
Local station No.1 uses the X/Y0 to 17F range as inputs and outputs for host
station.
The X/Y180 to X/Y7FF range can be used for the data link.
2) Assignment of local station No.2
Local station No.2 uses the X/Y0 to X/Y14F range as inputs and outputs for
host station.
The X/Y150 to X/Y7FF range can be used for the data link.
Fig 7.11 Inputs (X) and outputs (Y) assignment example
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