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CHAPTER 8 FUNCTIONS
8
8.
1
C
ycl
ic
Tra
n
smi
ssi
on
8.
1.
2
Link ref
resh
8.1.2
Link refresh
Data can be automatically transferred between the link devices of the master/local module and the devices of the CPU
module.
(1) Concept of the link refresh range
The link refresh is performed to the area set with the refresh parameters and also set in the network configuration
settings.
(2) Shortening the link refresh time and transmission delay time
The link refresh time and transmission delay time can be shortened by reducing the number of link refresh points
to the CPU module. The following methods can be used to reduce the number of the link refresh points.
• In the refresh parameters setting, set only the link devices used in the CPU module as the link refresh range.
(
• Directly access infrequently used link devices from the program, and remove the corresponding settings
from the link refresh range. (
CPU
module
Device
RX
RY
RWr
RWw
Master/local
module
Link refresh
Link
device
CPU module
Device
Range set by
refresh parameters
Master/local module
Link device
Link refresh
Link refresh
Link refresh
Empty
Empty
Actual link
refresh range
Range set in
the network
configuration
setting