R6-NE1
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
EM-7787 Rev.7 P. 7 / 9
MODBUS I/O ASSIGNMENTS
The DIP SW located at the side of the module switches the unit’s data allocation mode.
In the Data Allocation Mode 1, one (1) word is assigned per module. The second channel of analog I/O modules cannot be used.
In the Data Allocation Mode 2, two (2) words are assigned per module regardless of whether the second word area is required
or not.
For discrete I/O, 16-channel area is automatically assigned to each module. With a 4-channel module, the bits assigned to ch.
5 through 16 remain “0.”
Note: DO NOT access addresses other than mentioned below. Such access may cause problems such as inadequate operation.
Coil (0X)
1 – 16
Module address 0
Do 1 – 4
17 – 32
Module address 1
Do 1 – 4
33 – 48
Module address 2
Do 1 – 4
49 – 64
Module address 3
Do 1 – 4
:
:
:
241 – 256
Module address 15 Do 1 – 4
Inputs (1X)
1 – 16
Module address 0
Di 1 – 4
17 – 32
Module address 1
Di 1 – 4
33 – 48
Module address 2
Di 1 – 4
49 – 64
Module address 3
Di 1 – 4
:
:
:
241 – 256
Module address 15 Di 1 – 4
257 – 272
Active module map
273 – 288
Status
289 – 320
Channel status
■
Data Allocation Mode 1
Input Registers
(3X)
1
Module address 0
Ai 1 (INT)
2
Module address 1
Ai 1 (INT)
3
Module address 2
Ai 1 (INT)
4
Module address 3
Ai 1 (INT)
:
:
:
16
Module address 15 Ai 1 (INT)
17, 18 Module address 0
Ai 1 (Float)
19, 20 Module address 1
Ai 1 (Float)
21, 22 Module address 2
Ai 1 (Float)
23, 24 Module address 3
Ai 1 (Float)
:
:
:
47, 48 Module address 15 Ai 1 (Float)
Holding Registers
(4X)
1
Module address 0
Ao 1 (INT)
2
Module address 1
Ao 1 (INT)
3
Module address 2
Ao 1 (INT)
4
Module address 3
Ao 1 (INT)
:
:
:
16
Module address 15 Ao 1 (INT)
17, 18 Module address 0
Ao 1 (Float)
19, 20 Module address 1
Ao 1 (Float)
21, 22 Module address 2
Ao 1 (Float)
23, 24 Module address 3
Ao 1 (Float)
:
:
:
47, 48 Module address 15 Ao 1 (Float)
■
Data Allocation Mode 2
Input Registers
(3X)
1
Module address 0
Ai 1 (INT)
2
Module address 0
Ai 2 (INT)
3
Module address 1
Ai 1 (INT)
4
Module address 1
Ai 2 (INT)
:
:
:
31
Module address 15 Ai 1 (INT)
32
Module address 15 Ai 2 (INT)
33, 34 Module address 0
Ai 1 (Float)
35, 36 Module address 0
Ai 2 (Float)
37, 38 Module address 1
Ai 1 (Float)
39, 40 Module address 1
Ai 2 (Float)
:
:
:
93, 94 Module address 15 Ai 1 (Float)
95, 96 Module address 15 Ai 2 (Float)
Holding Registers
(4X)
1
Module address 0
Ao 1 (INT)
2
Module address 0
Ao 2 (INT)
3
Module address 1
Ao 1 (INT)
4
Module address 1
Ao 2 (INT)
:
:
:
31
Module address 15 Ao 1 (INT)
32
Module address 15 Ao 2 (INT)
33, 34 Module address 0
Ao 1 (Float)
35, 36 Module address 0
Ao 2 (Float)
37, 38 Module address 1
Ao 1 (Float)
39, 40 Module address 1
Ao 2 (Float)
:
:
:
93, 94 Module address 15 Ao 1 (Float)
95, 96 Module address 15 Ao 2 (Float)
