Mitsubishi Electronics A1SJ71AT23BQ ユーザーズマニュアル

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OVERVIEW
1.1 Features
 
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(2) Transient transmission function
(a) Communication from a master station to a local station
By executing the LRDP/LWTP instruction in the sequence program of the master 
station, data can be read from or written to local station devices (T, C, D, W).
(b) LRDP/LWTP instruction receive processing
A Q series local station and an A/QnA series local station are different in 
processing at the time of accepting the LRDP/LWTP instruction. 
1) Q series local station
The receive processing is performed to the LRDP/LWTP instruction in a 
sequence program.
2) A/QnA series local station
The receive processing is performed to the LRDP/LWTP instruction in the 
system.
(The program for receiving LRDP/LWTP instruction is not required.)
Figure 1.6 LWTP instruction receive processing (Q series local station)
Figure 1.7 LWTP instruction receive processing (A/QnA series local station)
Q series local station
Local module
CPU module
Link data
storage area
Buffer memory
Buffer memory
Data memory
storage area
DC
H
DMOV          Z0
BMOV           D0Z1 Z2
Write data
Master station
Data memory
storage area
D20 to D29
Command
LWTP
Device
write
D200 to D209
= K4
MOV             Z2
= H4420 Z0
U0\
G174
U0\
G220
U0\
G216
U0\
G219
"A part" of the program for receiving LWTP instruction
A/QnA series local station
Link module
CPU module
Data memory
storage area
Master station
Data memory
storage area
D20 to D29
Command
LWTP
Device
write
D200 to D209