YASKAWA MP920 User Manual page 255

Input Register Read
Command
7 0
(L)
Length: 07H
(H)
MFC: 20H
SFC: 04H
CPU No.
(H)
Reference No.
(L)
(H)
No. of registers (n)
(L)
Response
7 0
Length: 03H+
(L)
No.of registers×2
(H)
MFC: 20H
SFC: 04H
CPU No.
(H)
Data 1
(L)
(H)
Data n
(L)
Single Coil Status Change
Command
7 0
(L)
Length: 07H
(H)
MFC: 20H
SFC: 05H
CPU No.
(H)
Reference No.
(L)
ON/OFF=FFH/00H
00H
Response
7 0
(L)
Length: 07H
(H)
MFC: 20H
SFC: 05H
CPU No.
(H)
Reference No.
(L)
ON/OFF=FFH/00H
00H
Set the command length.
Always 20H.
The SFC number is 04H when the input register contents are read.
Set 4 bits each for the destination CPU number and the source
CPU number.
Set the leading address of input the input registers to be read.
Set the number of input registers to be read.
Set the command length.
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 status of the read input registers is returned.
Set the command length.
Always 20H.
The SFC number is 05H when the status of a single coil is changed.
Set 4 bits each for the destination CPU number and the source
CPU number.
Set the address of the coil to be changed.
Set the status for the coils.
Set the command length.
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 address of the changed coil to be returned.
The status of the changed coil is returned.
B-7
B.1 Extended MEMOBUS Messages
B