Yaskawa MP920 Communications Module User Manual
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Appendix B 218IF Messages
B.1.1 Message Configuration
B-4
List of Extended MEMOBUS Commands
The commands that make up the Extended MEMOBUS messages are identified by a func-
tion code, and have the functions shown in the following table.
Function Code
Function
Extended
MEMOBUS
Protocol
(BIN)
Extended
MEMOBUS
Protocol
(ASCII)
01H
Coil status read
2,000 points
2,000 points
02H
Input relay status read
2,000 points
2,000 points
03H
Holding register read
125 words
125 words
04H
Input register read
125 words
125 words
05H
Single coil status change
1 point
1 point
06H
Single holding register write
1 word
1 word
08H
Loopback test
−
−
09H
Holding register read (extended)
508 words
508 words
0AH
Input register read (extended)
508 words
508 words
0BH
Holding register write (extended)
507 words
507 words
0DH
Discontinuous holding register read
(extended)
508 words
508 words
0EH
Discontinuous holding register write
(extended)
254 words
254 words
0FH
Multiple coil status change
800 points
800 points
10H
Multiple holding register write
100 words
100 words
31H
MELSEC fixed buffer communications
507 words
507 words
32H
MELSEC random buffer read
508 words
508 words
33H
MELSEC random buffer write
507 words
507 words