Link Refresh - Mitsubishi Electric MELSEC iQ-R Series User Manual

Link refresh

This function automatically transfers data between the devices of the Motion module and CPU module.
CPU module
Link refresh
SB
Link refresh
SW
Link refresh
X
Link refresh
Y
Link refresh
W
Link refresh
W
Link refresh
B
Link refresh
W
When the version of Add-on baseSystem is "1.18" or earlier, the link refresh is not supported. Link refresh will
not be performed even if it is set.
Concept of the link refresh range (number of points)
The link refresh is performed in the range set in "Refresh Settings" under "Basic Settings" and also specified in "Network
Configuration Settings".
(2)
(1)
(1) Range set in "Refresh Settings" under "Basic Settings"
(2) Actual link refresh range
(3) Range set in "Network Configuration Settings" under "Basic Settings"
Shortening the transmission delay time
The transmission delay time can be shortened by reducing the number of link refresh points and shortening a communication
cycle interval. (Page 275 Communication cycle interval)
The following methods can be used to reduce the number of the link refresh points.
• In "Refresh Settings" under "Basic Settings", set only the link devices that are frequently used in the CPU module in the link
refresh range. (Page 100 Refresh Settings)
• Remove the link devices that are infrequently used in the CPU module from the link refresh range, and directly read/write
the corresponding data from/to the program by direct access. (Page 33 Direct access to link devices)
Link refresh is performed in END processing of the sequence scan of the CPU module.
Motion module
SB
SW
RX
RY
RWr
RWw
LB
LW
CPU module
Link refresh
Link refresh
Link refresh
Motion module
(3)
Empty
Empty
1 FUNCTIONS
31
1.1 Cyclic Transmission
1