Mitsubishi MELSEC LJ71C24, Руководство пользователя

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App. - 39 App. - 39
APPENDIXES
(b) Data flow is 'Reverse direction'
Data length
Code type
1 byte 2 bytes 3 bytes 4 bytes
ASCII hexadecimal
"20"
(32
H
30
H
)
"201"
(32
H
30
H
31
H
)
"2010"
(32
H
30
H
31
H
30
H
)
ASCII decimal
"85"
(38
H
35
H
)
"852"
(38H 35H 32H) "8520"
(38
H
35
H
32
H
30
H
)
HEX 0201
H
020100
H
02010000
H
(c) Data flow is 'Byte swap'
Data length
Code type
1 byte 2 bytes 3 bytes 4 bytes
ASCII hexadecimal
"1020"
(31
H
30
H
32
H
30
H
)
ASCII decimal
"2085"
(32
H
30
H
38
H
35
H
)
HEX 00000201
H
(3) Calculating range
The following shows specification examples of the calculating range of Length.
Terminator Header Variable Check code Static data
Packet
element 1 Packet
element 3 Packet
element n Packet
element n-1 Packet
element n-2
Packet
format
Calculating range when specifying 1 to n
Calculating range when specifying 3 to (n-2)
Calculating range when specifying 3 to n
Example 1
Example 2
Example 3
Length
Packet
element 2
Example 1: Calculating range when its start is 1 and end is n.
Example 2: Calculating range when its start is 3 and end is n-2.
Example 3: Calculating range when its start is 3 and end is n.