Yaskawa MP920 Communications Module - Manual (Page 258)

B.1 Extended MEMOBUS Messages
B-9
B
„ Holding Register Read (Extended)
MFC: 20H
SFC: 09H
Length: 08H
SPARE
CPU No.
Set the command length.
Command
The SFC number is 09H when the holding register contents are
read.
Set 4 bits each for the destination CPU number and the source
CPU number.
Set the leading address of the holding registers to be read.
Set the number of holding registers to be read.
(L)
(H)
Reference No.
No. of registers (n)
(L)
(L)
(H)
(H)
7 0
Always 20H.
MFC: 20H
SFC: 09H
Length: 06H+
SPARE
CPU No.
Data 1
Data n
(L)
(H)
(L)
(H)
(L)
(H)
(L)
(H)
Set the command length.
Response
Always 20H.
The same SFC number as that specified in the command is
returned.
Set 4 bits each for the destination CPU number and the source
CPU number.
The holding register contents are returned.
The number of read holding registers is returned.
7 0
No.of registers×2
No. of registers (n)