Appendix 5.3.2 Non-Conversion Variable - Mitsubishi Melsec-L Series User Manual

Appendix 5.3.2 Non-conversion variable

C24
Sending data
"ABCD"
Receiving data
"ABCD"
App. - 40
(1) Processing procedure
The C24 processes Non-conversion variable according to the following
procedure.
"ABCD"
(Byte swap)
Disable byte swap
Swapping
receive data
Enable byte swap
"ABCD"
(Byte swap)
(Fixed length/Variable length)
(Data length/Maximum data length)
(Unit of stored data)
Unit of
stored data
Data
storage
area
"ABCD"
Disable byte swap
Swapping
send data
Enable byte swap
"BADC"
Unit of
stored data
Data
storage
area
(Fixed length/Variable length)
(Data length/Maximum data length)
(Unit of stored data)
Unit of
stored data
Data
storage
area
"ABCD"
"BADC"
Unit of
stored data
Data
storage
area
When "Byte swap" is 'Disable'
Lower bytes only
Lower byte + Upper byte
'B'
'A'
D0 D0
00h
(42h) (41h)
'D' 'C'
D1 D1
00h
(44h) (43h)
D2
00h
D3
00h
C24
CPU device
ignores data of upper bytes
G device
Send data
When "Byte swap" is 'Enable'
Lower byte + Upper byte Lower bytes only
'A' 'B'
D0 D0
00h
(41h) (42h)
'C' 'D'
D1 D1
00h
(43h)
(44h)
D2
00h
D3
00h
C24
ignores data of upper bytes
When "Byte swap" is 'Disable'
Lower bytes only
Lower byte + Upper byte
'B'
'A'
D0 D0
00h
(42h) (41h)
'C'
'D'
D1 D1
00h
(43h)
(44h)
D2
00h
D3
00h
CPU device
C24
G device stores 00h to upper bytes
Receive data
When "Byte swap" is 'Enable'
Lower bytes only
Lower byte + Upper byte
'A' 'B'
D0 D0
00h
(41h) (42h)
'C' 'D'
D1 D1
00h
(43h)
(44h)
D2
00h
D3
00h
C24
stores 00h to upper bytes
APPENDIXES
'A'
(41h)
'B'
(42h)
'C'
(43h)
'D'
(44h)
'B'
(42h)
'A'
(41h)
'D'
(44h)
'C'
(43h)
'A'
(41h)
'B'
(42h)
'C'
(43h)
'D'
(44h)
'B'
(42h)
'A'
(41h)
'D'
(44h)
'C'
(43h)
App. - 40