Program Example Of Cyclic Transmission - Mitsubishi Electric MELSEC Q Series Reference Manual

8.1.3

Program example of cyclic transmission

The following shows a program example of cyclic transmission.
(1) Overview of the program example
D0 of the control station (No. 1) is sent to Y50 to Y5F of the normal station (No. 2) through cyclic transmission.
In the program example in this section, an interlock is established with link relay (LB) and cyclic data is sent.
Send
request
MOV D0 W0
SET B0
(Processing at control station (No. 1)-side)
1.
Turn ON the send request.
2.
Store D0 data in W0.
3.
When data storage is completed, turn ON B0 for handshake.
4.
Link relay (LB) is sent through cyclic transmission after link register (LW).
(Processing at normal station (No. 2)-side)
5.
B0 is turned ON.
6.
Store W0 contents in Y50 to Y5F.
7.
When data storage to Y50 to Y5F is completed, turn ON B200 for handshake.
(Processing at control station (No. 1)-side)
8.
When B200 is turned ON, turn B0 OFF.
Control station
No.1
CC-Link IE
Controller
CPU module Network module
B0 LB0
No.1 No.1
B200 LB200
No.2 No.2
W0
LW0
No.1 No.1
No.2 No.2
Normal station
No.2
CC-Link IE
Controller
Network module CPU module
LB0 B0
No.1 No.1
LB200 B200
No.2 No.2
W0
LW0
No.1 No.1
No.2 No.2
Cyclic transmission
(Range set in network range assignment)
Link refresh
(Range set with refresh parameters)
CHAPTER 8 PROGRAMMING
B0
BCD W0 K4Y50
275
8