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

02H

Input relay status read

2,000 points

03H

Holding register read

125 words

04H

Input register read

125 words

05H

Single coil status change

1 point

06H

Single holding register write

1 word

08H

Loopback test

−

09H

Holding register read (extended)

508 words

0AH

Input register read (extended)

508 words

0BH

Holding register write (extended)

507 words

0DH

Discontinuous holding register read
(extended)

508 words

0EH

Discontinuous holding register write
(extended)

254 words

0FH

Multiple coil status change

800 points

10H

Multiple holding register write

100 words

31H

MELSEC fixed buffer communications

507 words

32H

MELSEC random buffer read

508 words

33H

MELSEC random buffer write

507 words