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The components of assembly objects in I-7242D
Assembly Object Instance
ID
0x64
0x65
0x66
0x67
"User-defined Modbus Device Object" ( 0x64 ) attributes:
Attribute ID
0x01
0x02
0x03
Device Start Address
0x04
0x05
Data Lose Counter
0x14
0x15
0x16
0x17
7. Steps to implement the DeviceNet applications by
using the command set
1. Request the use of the Predefined Master/Slave Connection Set.
2. Apply
the
expected_packet_rate attribute of the I/O connection and make the I/O
Connection Object State established.
3. There are two ways to access I/O devices. One method is by the way of the
I/O connection object. Another is by using an explicit message to set/get the
I/O attribute of application object.
4. Release the use of the Predefined Master/Slave Connection Set.
I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 8
Data Length (Byte)
Description
Device ID
Device I/O Type
Device Length
DO Data
AO Data
DI Data
AI Data
Master's
Explicit
DO: 2
AO: 6
DI: 1
AI: 8
Data Type
Method
CHAR
CHAR
WORD
WORD
WORD
Get/Set
Defined by
Get/Set
device num.
Defined by
Get/Set
device num.
Defined by
device num.
Defined by
device num.
Request
Messages
Component devices
(ID, Address)
1(00016~00001)
2(40001~40003)
3(10007~10001)
4(30001~30004)
Value
Get
0
Get
0
Get
0
Get
0
0
0
0
Get
0
Get
0
to
set
the
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