MODEL: R3-NM4

R3-NM4 SPECIFICATIONS

ES-8331 Rev.6 Page 5/8

http://www.m-system.co.jp/

MODBUS I/O ASSIGNMENT

ADDRESS

DATA FORMAT

NAME

Coil (0X)

1 – 1024

Digital Output (discrete output)

1025

Main / Sub Switching Command (valid only with SW3-3 set to ON)

Inputs (1X)

1 – 1024

Digital Input (discrete input)

1025 – 1040

Module Status

1041 – 1056

Error Status

1057 – 1072

Data Error Status

Input Registers (3X)

1 – 256

I

Analog Input

257 – 768

F

Analog Input

Holding Registers (4X)

1 – 256

I

Analog Output

257 – 768

F

Analog Output

I : Integer, 0 – 10000 (0 – 100%)

F : Floating (32-bit data cannot be accessed using floating addresses.)

Note: DO NOT access addresses other than mentioned above. Such access may cause problems such as inadequate operation.

• Module Status indicates whether individual I/O modules are mounted or not. The bit corresponding to the mounted slot turns to

“1,” and the unmounted slot to “0.”

• Error Status indicates error status for each module as described below. The bit corresponding to such module turns to “1.”

R3-TSx, R3-RSx, R3-US4: Input burnout

R3-DA16A:

Power input in error or disconnected

R3-YSx:

Output current error (e.g. load unconnected)

R3-PC16A:

External power supply in error or disconnected

• Data Error Status indicates overrange (R3-US4: out of -10% to +110%; the other types: out of -15% to +115%) status for each

module. The bit corresponding to such module turns to “1.”

• Main / Sub Switching Commands given to the network modules result as follows:

MAIN’ MODULE

‘SUB’ MODULE

OUTPUT MODE

1

0

Main bus is used; Red light turns on at RUN LED of the I/O modules.

0

1

Sub bus is used; Green light turns on at RUN LED of the I/O modules.

1

1

Main bus is used; Amber light turns on at RUN LED of the I/O modules.

0

0

Output is invalid; RUN LED of the I/O modules turns off.

TRANSMISSION DATA DESCRIPTIONS

The DIP SW located at the side of the module speci es each I/O module’s data allocation (occupied data area).

For example, when the data areas are assigned as shown below:

Module 1

4

Module 2

4

Module 3

4

Module 4

1

Module 5

1

Module 6

1

Module 7

1

Then the I/O data are assigned as in the table below:

ADDRESS

POSITION

Input Registers (3X)

Holding Registers (4X)

1 – 4,

257 – 264

Slot 1

5 – 8,

265 – 272

Slot 2

9 – 12,

273 – 280

Slot 3

13,

281 – 282

Slot 4

14,

283 – 284

Slot 5

15,

285 – 286

Slot 6

16,

287 – 288

Slot 7

ADDRESS

POSITION

Coil (0X)

Inputs (1X)

1 – 64

Slot 1

65 – 128

Slot 2

129 – 192

Slot 3

193 – 208

Slot 4

209 – 224

Slot 5

225 – 240

Slot 6

241 – 256

Slot 7

For Coil (0X) and Inputs (1X), addresses 16 times assigned data

areas (Data Allocation Type) are allotted with the Data Allocation

Type ‘1’ and ‘4.’ With ‘8’ and ‘16,’ 64 (4 × 16) are automatically al-

lotted.