Network Refresh Parameters - Mitsubishi Electric QJ71LP21 Reference Manual

5 PARAMETER SETTINGS

5.1.5 Network refresh parameters

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The refresh parameters are used to transfer the link device data (LB, LW, LX, LY) of
the network link module to the devices (X, Y, M, L, T, B, C, ST, D, W, R, ZR) of the
CPU module for operation of the sequence programs.
By eliminating the network refresh of those link devices that are not used by the
sequence programs, the scan time can also be reduced.
Because it is not necessary to transfer the link devices to different devices with the
sequence programs, the number of program steps is reduced and easy-to-understand
programs can be created.
POINT
Note that there are no default settings for LX/LY points in the refresh parameters.
A CPU that does not have the number of points set cannot input and output
network link device LX/LY.
(Refresh parameter setting screen)
The assignment status of the above refresh parameters can be checked with the
assignment image diagram.
The assignment image diagram displays the device assignment status of the CPU
module as well as between the MELSECNET/H modules (module 1 to 4).
CPU module
0
Not possible
Duplicate
to
5FF
9FF
1FFF
Using the assignment image diagram, assignment errors and duplicate settings
between the modules can also be checked.
It is a convenient tool to view the assignment status when setting or changing the
network refresh parameters.
Master module 1 Master module 2
0
to
5FF
3FFF
MELSEC-Q
0
to
9FF
3FFF
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