Mitsubishi Electric MELSEC iQ-RJ71GF11-T2 - Page 24

22
1 FUNCTIONS
1.1 Cyclic Transmission
Readable and writable range
Data can be read or written between the master/local module and CPU module mounted on the same base unit.
■Read
All link devices of the master/local module can be specified. ( Page 21 Specification method)
■Write
The range that satisfies all of the following conditions can be specified.
• Area where data is sent to other stations and outside the link refresh range ( Page 16 Data flow and link device
assignment)
• Within the link device range of the master/local module ( Page 21 Specification method)
Ex.
When writing data to the area in the link refresh range, directly access the link device and write the same data
in the device of the CPU module.
• Bad example (Only direct access to the link refresh target)
Link refresh overwrites the value.
• Good example (In addition to direct access, writing the same data to the CPU module device)
The value written by direct access is reflected.
(1) Out of the link refresh range
(2) Area where data is sent to other stations
(3) Area for receiving the data from other stations
(2)
(1)
(3)
Y
RY
CPU module Master/local module
This area is
writable.
Link refresh
Link refresh
RWw
20 300 RWw100
W
300W100
Master/local moduleCPU module
Link refresh
MOV K20 J1\W100
RWw100
W100
RWw
20
W
20
MOV K20 W100
Master/local moduleCPU module
Link refresh
MOV K20 J1\W100