Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Page 275

14 ON-DEMAND DATA COMMUNICATIONS USING USER FRAMES
14.3 On-Demand Function Control Procedure During User Frame Use
273
14
17H 0DH 0AH02H 00H
3BH
12H
34H 56H 78H
03H
02H 0DH 0AH
3BH
03HFFH,01H FFH,F0H
S
T
X
E
T
X
C
R
L
F
0
C00H
2
0
1234H
5678H
3ECH
0H
402H
0H
；
Added by C24
Target device
First frame
(1st)
Last frame
(1st)
User frame User frame
Send data
(Data name)
User frame
registration code
CPU module
Station No.
Sum
check
code
Send data corresponding to
registration code
(Example)
Send data code
ONDEMAND command
ONDEMAND command complete bit
ONDEMAND command abnormal
completion bit
1 scan
Buffer memory
Un\G150
(Word units)
(First address)
Un\G160
Un\G161
(Data length)
(1st first frame No.)
Un\G169
Un\G170
(2nd first frame No.)
Un\G171
(1st last frame No.)
Un\G172
(2nd last frame No.)
When a transmission
error is generated,
other than 0 is stored.
(Result of execution)
Un\G598
Sequentially transmits the data in 4-bit units,
beginning
from the most significant bit.
Un\G3072
(Send data)
Un\G3073
(CH1 side)