Mitsubishi Electric MELSEC-Q Series - LX;LY Settings

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6.3.2 LX/LY settings
For each block, set an I/O master station and I/O ranges used in communication using LX/LY between the I/O master
and relevant stations. ( Page 66, Section 4.1.2)
Set "LX/LY Setting(1)" for block 1, and "LX/LY Setting(2)" for block 2.
M station: I/O master station, L station: Other station
*1 The LX/LY data of the same I/O numbers with the actual I/O (the range where actual modules are mounted) must be
refreshed to the area after the actual I/O area or to any other than LX/LY by refresh parameters.
Transfer target CPU-side devices in refresh parameters cannot overlap with the actual I/O areas. ( Page 204,
Section 6.5.1)
● The LX/LY points for each station can be 8192 (1FFF
H
) or less.
● Avoid duplication of the LX/LY settings for each station in "LX/LY Setting(1)" and "LX/LY Setting(2)".
Item Description
Assignment Method
Select an LX/LY assignment method.
• Points/Start: Enter link device points and start I/O numbers.
• Start/End: Enter the start and end numbers of the link devices.
M St.  L St.
LY (Points/Start/End)
Set the output range (LY) of M station in 16-point units. (Start: 0
H
to End:
F
H
) (Setting range: 0000
H
to 1FFF
H
, Default: None)
*1
LX (Points/Start/End)
Set the start No. of the input range (LX) of L station in 16-point units (0
H
).
(Setting range: 0000
H
to 1FF0
H
, Default: None)
*1
M St. L St.
LX (Points/Start/End)
Set the input range (LX) of M station in 16-point units. (Start: 0
H
to End:
F
H
) (Setting range: 0000
H
to 1FFF
H
, Default: None)
*1
LY (Points/Start/End)
Set the start No. of the output range (LY) of L station in 16-point units (0
H
).
(Setting range: 0000
H
to 1FF0
H
, Default: None)
*1
Specify I/O Master Station Set an I/O master station for each block to perform communication using LX/LY.
Equal Assignment
The link device I/O range can be equally assigned between the I/O master and other
stations. (LX/LY Setting(1) only)