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MODBUS I/O ASSIGNMENTS
Coil (0X)
Inputs (1X)
1025 – 1040
1041 – 1056
1057 – 1072
Input Registers (3X)
Holding Registers (4X)
2001 – 50000
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 module are mounted or not. The bit corresponding to the mounted slots
turns to "1," and the unmounted slots to "0."
• Error Status indicates error status for each module as described below. The bit corresponding to such modules 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)
• 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 modules turns to "1."
• Main / Sub Switching Commands given to the network modules result as follows:
'MAIN' MODULE
'SUB' MODULE
1
0
1
0
• In the extended I/O area, 3000 words are mapped for each I/O module.
Refer to the instruction manual of each I/O module for details.
SLOT
1
2
3
4
:
14
15
ADDRESS
DATA FORMAT NAME
1 – 1024
1025
1 – 1024
1 – 256
I
257 – 768
F
1 – 256
I
257 – 768
F
OUTPUT MODE
0
Main bus is used; Red light turns on at RUN LED of the I/O modules.
1
Sub bus is used; Green light turns on at RUN LED of the I/O modules.
1
Main bus is used; Amber light turns on at RUN LED of the I/O modules.
0
Output is invalid; RUN LED of the I/O modules turns off.
ADDRESS
2001 – 5000
5001 – 8000
8001 – 11000
11001 – 14000
:
44001 – 47000
47001 – 50000
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
Digital Output (discrete output)
Main / Sub Switching Command (valid only with SW3-3 set to ON)
Digital Input (discrete input)
Module Status
Error Status
Data Error Status
Analog Input
Analog Input
Analog Output
Analog Output
Extended I/O
R3-NM3
EM-8330 Rev.3 P. 6 / 9
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