Reducing The Link Refresh Time - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

3 SPECIFICATIONS

3.3.3 Reducing the link refresh time

Range that is
actually
refreshed
Range set in
Refresh parameters
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The link refresh time can be reduced by decreasing the number of refresh points to the
CPU module.
Reduce the refresh points by any of the following:
• Refresh parameters
• Common parameters
• Direct access to link devices
• Station inherent parameters
(1) Concept of the refresh range (number of points)
The ranges set with common parameters and within the set range of Refresh
parameters are refreshed.
QCPU
Device
Refresh
Refresh
Refresh
POINT
(1) During the initial settings (to return to the initial settings, click the default
button of GX Developer) of the refresh parameters, the range from the start to
end addresses is set, which can be viewed with the assignment image figure
of the refresh parameters.
(2) The initial settings of the station inherent parameters are the same as the
setting range of the common parameters.
Network module
Station inherent
parameters
Link
1M 1
P
Empty
Link
1N 2
S
Empty
Link
1N 3
S
MELSEC-Q
Common
parameters
1M 1
P
Empty
1N 2
S
Empty
1N 3
S
Range set with
common
parameters
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