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TRANSMISSION DATA DESCRIPTIONS
Use the DIP SW located at the side of the module to specify module allocation.
1 module is equivalent to 1 I/O module with 16 words analog input and 16 words analog output. Max. 8 modules (128 words
input, 128 words output) transmission is available. R3-GM1 seems as if max. 8 I/O modules are mounted to 8 slots via Mod-
bus.
The input of the module is processed as follows.
Modbus Communication
In responding to the input, the output (Holding Register) command becomes valid via Modbus communication, and the input
(Input Register) command is valid in the output.
Note: Do not mount any modules in the slots which are occupied by virtual modules. If a real I/O module is mounted in the slot, an
internal bus error occurs and the ERR LED turns on. Max. 16 real I/O modules and virtual modules are available.
The interface module can not read the data for more than 16 modules.
■ WHEN R3-GM1 IS MOUNTED ON SLOT NO. 2 (4 modules)
Real I/O modules are mounted on Slots No. 1 and 2, however, the network module (R3-NC3) recognizes that each of Slots No.
1 to 5 is occupied. That is, R3-NC3 recognizes R3-SV4 mounted on Slot No.1 as it is and recognizes R3-GM1 mounted on Slot
No.2 as divided into four modules and occupying Slots No. 2 to 5.
R3-BS08
R3-
R3-
SV4
GM1
1
2
3
INPUT/OUTPUT DATA
■ MODULE STATUS
Module Status indicates whether individual I/O module is
mounted or not, normal or not.
15
■ ANALOG INPUT/OUTPUT DATA
15
16 bits binary data
R3-GM1 Module
R3-
R3-
NC3
PS1
4
5
6
7
8
0
Module 1 (Slot 1)
Module 2 (Slot 2)
Module 3 (Slot 3)
Module 8 (Slot 8)
0
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
R3 Communication Module
R3 Base
SLOT
REAL MODULE
Slot No. 1
R3-SV4
Slot No. 2
R3-GM1
Slot No. 3
No module
Slot No. 4
No module
Slot No. 5
No module
Slot No. 6
No module
Slot No. 7
R3-NC3
Slot No. 8
R3-PS1
R3-GM1
VIRTUAL MODULE
NO. OF WORDS
R3-SV4
4 Words
R3-GM1 (1/4)
16 Words
R3-GM1 (2/4)
16 Words
R3-GM1 (3/4)
16 Words
R3-GM1 (4/4)
16 Words
No module
----
R3-NC3
----
R3-PS1
----
EM-8463 Rev.5 P. 6 / 6
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