Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 382

(2) Specification range
A link device that is not set in the Network parameter dialog box can be specified.
(a) Writing
• The write range must be within the link device send range that is set by common parameters on Network
parameter setting dialog box, and it must be outside the refresh range set by network refresh parameters.
CPU module
• Although writing can be done to a refresh range portion (specified by refresh parameters) within the link
device range, the link module's link device data will be overwritten when a refresh occurs.
When writing data by using a link direct device, write the same data to the relevant devices on the CPU
module side, which are set by refresh parameters.
[Refresh parameter settings]
1) Network number: 1
2) CPU module (W0 to W3F) ↔ Network module (LW0 to LW3F)
[Sequence program]
[Writing timing]
• If data are written to another station's write range using a link direct device, the data will be overwritten
with other data that are received from the corresponding station.
380
B 0
Refresh range
Write range
MOV K100 W1
MOV
CPU module
MOV K100 W1
MOV W1 J1\W1
Writing at instruction
execution
Network module
LB 0
"100" is written to network module
LW1 when a refresh occurs.
"100" is written to network module
W1 J1\W1
LW1 when the MOV instruction is
executed.
Network module
Writing at
instruction
execution
W0
W1
Writing by a refresh
Link range
Send range
LW1