Table of Contents
Advertisement
(3) 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
B 0
• Although writing can be done to a refresh range portion (specified by refresh parameters) within the link
device range, the link moduleís 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)
[Sequence program]
[Writing timing]
Figure 9.51 Writing to the link device set within the refresh range
• If data are written to another stationís write range using a link direct device, the data will be overwritten
with other data that are received from the corresponding station.
Network module
LB 0
Refresh range
Write range
Figure 9.50 Write range of a link direct device
Network module (LW0 to LW3F)
"100" is written to network module
MOV K100 W1
LW1 when a refresh occurs.
"100" is written to network module
MOV
W1
J1\W1
LW1 when the MOV instruction is
executed.
CPU module
MOV K100
W1
Writing at
instruction
execution
MOV
J1\W1
W1
W0
W1
Writing at instruction
execution
Link range
Send range
Network module
LW1
Writing by a refresh
CHAPTER9 DEVICES
9
2
3
4
5
6
7
8
9 - 41
Advertisement
Table of Contents
