Mitsubishi Electric MELSEC iQ-R Series User Manual page 275

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