|
Modbus address |
Byte BYTE |
Bit (byte-oriented) BOOL |
Word WORD |
Double word DWORD |
|
|---|---|---|---|---|---|
|
HEX |
DEC |
||||
|
0000 |
0 |
%MB0 |
%MX0.0 ... %MX0.7 |
%MW0 |
%MD0 |
|
%MB1 |
%MX1.0 ... %MX1.7 |
||||
|
0001 |
1 |
%MB2 |
%MX2.0 ... %MX2.7 |
%MW1 |
|
|
%MB3 |
%MX3.0 ... %MX3.7 |
||||
|
0002 |
2 |
%MB4 |
%MX4.0 ... %MX4.7 |
%MW2 |
%MD1 |
|
%MB5 |
%MX5.0 ... %MX5.7 |
||||
|
0003 |
3 |
%MB6 |
%MX6.0 ... %MX6.7 |
%MW3 |
|
|
%MB7 |
%MX7.0 ... %MX7.7 |
||||
|
... |
|||||
|
7FFE |
32766 |
%MB65532 |
%MX65532.0 ... %MX65532.7 |
%MW32766 |
%MD16383 |
|
%MB65533 |
%MX65533.0 ... %MX65533.7 |
||||
|
7FFF |
32767 |
%MB65534 |
%MX65534.0 ... %MX65534.7 |
%MW32767 |
|
|
%MB65535 |
%MX65535.0 ... %MX65535.7 |
||||
|
8000 |
32768 |
%MB65536 |
%MX65536.0 ... %MX65536.7 |
%MW32768 |
%MD16384 |
|
%MB65537 |
%MX65537.0 ... %MX65537.7 |
||||
|
8001 |
32769 |
%MB65538 |
%MX65538.0 ... %MX65538.7 |
%MW32769 |
|
|
%MB65539 |
%MX65539.0 ... %MX65539.7 |
||||
|
8002 |
32770 |
%MB65540 |
%MX65540.0 ... %MX65540.7 |
%MW32770 |
%MD16385 |
|
%MB65541 |
%MX65541.0 ... %MX65541.7 |
||||
|
8003 |
32771 |
%MB65542 |
%MX65542.0 ... %MX65542.7 |
%MW32771 |
|
|
%MB65543 |
%MX65543.0 ... %MX65543.7 |
||||
|
... |
|||||
|
FFFE |
65534 |
%MB131068 |
%MX131068.0 ... %MX131068.7 |
%MW65534 |
%MD32767 |
|
%MB131069 |
%MX131069.0 ... %MX131069.7 |
||||
|
FFFF |
65535 |
%MB131070 |
%MX131070.0 ... %MX131070.7 |
%MW65535 |
|
|
%MB131071 |
%MX131071.0 ... %MX131071.7 |
||||
|
Modbus address |
Byte BYTE |
Bit (byte-oriented) BOOL |
Word WORD |
Double word DWORD |
|
|---|---|---|---|---|---|
|
HEX |
DEC |
||||
|
0000 |
0 |
%MB0 |
%MX0.0 |
%MW0 |
%MD0 |
|
0001 |
1 |
%MX0.1 |
|||
|
0002 |
2 |
%MX0.2 |
|||
|
0003 |
3 |
%MX0.3 |
|||
|
0004 |
4 |
%MX0.4 |
|||
|
0005 |
5 |
%MX0.5 |
|||
|
0006 |
6 |
%MX0.6 |
|||
|
0007 |
7 |
%MX0.7 |
|||
|
0008 |
8 |
%MB1 |
%MX1.0 |
||
|
0009 |
9 |
%MX1.1 |
|||
|
000A |
10 |
%MX1.2 |
|||
|
000B |
11 |
%MX1.3 |
|||
|
000C |
12 |
%MX1.4 |
|||
|
000D |
13 |
%MX1.5 |
|||
|
000E |
14 |
%MX1.6 |
|||
|
000F |
15 |
%MX1.7 |
|||
|
0010 |
16 |
%MB2 |
%MX2.0 |
%MW1 |
|
|
0011 |
17 |
%MX2.1 |
|||
|
0012 |
18 |
%MX2.2 |
|||
|
0013 |
19 |
%MX2.3 |
|||
|
0014 |
20 |
%MX2.4 |
|||
|
0015 |
21 |
%MX2.5 |
|||
|
0016 |
22 |
%MX2.6 |
|||
|
0017 |
23 |
%MX2.7 |
|||
|
0018 |
24 |
%MB3 |
%MX3.0 |
||
|
0019 |
25 |
%MX3.1 |
|||
|
001A |
26 |
%MX3.2 |
|||
|
001B |
27 |
%MX3.3 |
|||
|
001C |
28 |
%MX3.4 |
|||
|
001D |
29 |
%MX3.5 |
|||
|
001E |
30 |
%MX3.6 |
|||
|
001F |
31 |
%MX3.7 |
|||
|
0020 |
32 |
%MB4 |
%MX4.0 |
%MW2 |
%MD1 |
|
0021 |
33 |
%MX4.1 |
|||
|
0022 |
34 |
%MX4.2 |
|||
|
... |
... |
... |
... |
... |
... |
|
0FFF |
4095 |
%MB511 |
%MX511.7 |
%MW255 |
%MD127 |
|
1000 |
4096 |
%MB512 |
%MX512.0 |
%MW256 |
%MD128 |
|
... |
... |
... |
... |
... |
... |
|
7FFF |
32767 |
%MB4095 |
%MX4095.7 |
%MW2047 |
%MD1023 |
|
8000 |
32768 |
%MB4096 |
%MX4096.0 |
%MW2048 |
%MD1024 |
|
... |
... |
... |
... |
... |
... |
|
FFFF |
65535 |
%MB8191 |
%MX8191.7 |
%MW4095 |
%MD2047 |
Calculation of the bit variable from the hexadecimal address:
|
Formula: |
|||
|---|---|---|---|
|
|
Bit variable (BOOL) := %MXBYTE.BIT |
||
|
where: |
DEC |
Decimal address |
|
|
|
BYTE |
DEC / 8 |
|
|
|
BIT |
DEC mod 8 |
(Modulo division) |
Examples:
-
Address hexadecimal = 16#2002
DEC := 8194
BYTE := 8194 / 8 := 1024
BIT := 8194 mod 8 := 2
Bit variable: %MX1024.2
-
Address hexadecimal = 16#3016
DEC := 12310
BYTE := 12310 / 8 := 1538,75 -> 1538
BIT := 12310 mod 8 := 6
Bit variable: %MX1538.6
-
Address hexadecimal = 16#55AA
DEC := 21930
BYTE := 21930 / 8 := 2741,25 -> 2741
BIT := 21930 mod 8 := 2
Bit variable: %MX2741.2
Calculation of the hexadecimal address from the bit variable:
Examples:
-
Bit variable := %MX515.4
DEC := 515 * 8 + 4 := 4124
Address hex := 16#101C
-
Bit variable := %MX3.3
DEC := 3 * 8 + 3 := 27
Address hex := 16#001B
-
Bit variable := %MX6666.2
DEC := 6666 * 8 + 2 := 53330
Address hex := 16#D052