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
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