5 ACCESS FUNCTION USING NETWORK MODULE
5.2 Cyclic Transmission
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Access by link refresh
This method is used to access the devices of a C Controller module from a user program using link refresh.
Data flow
The following figure shows the data flow of link refresh.
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Device
C Controller modules use the following devices to share the data with network modules.
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Link refresh and its refresh cycle
The processing of data communication between devices of a C Controller module and link devices of a network module is
called as link refresh. The link refresh is performed in every refresh cycle of a C Controller module. (
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Parameter setting
When performing link refresh, set the following parameters.
• "Refresh Setting" and "Network Configuration Settings" of each network module
• Station-based block data assurance setting
Device
Number of points
Range of use
Internal relay
M
61440 points
M0 to 61439
Link relay
B
655360 points
B0 to 9FFFF
Data register
D
4184064 points
D0 to 4184063
Link register
W
1048576 points
W0 to WFFFFF
File register
ZR
1835008 points
ZR0 to 1835007
C Controller module
Network module
Network module
User program
Link
refresh
Device
Link
scan
Link
device
Link
device
Содержание MELSEC iQ-R C R12CCPU-V
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