I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 39/124
4.8
Connection Object ( Class : 0x05 )
This section presents the externally visible characteristics of the
connection objects associated with the Predefined Master/Slave Connection
Set within slave devices. With the I-7242D, the “Connection” object has up to
four instances (Instance ID 0x01 to 0x04). Each of these instances represents
one of the two ends of a virtual connection established between two nodes on
the DeviceNet network. Each instance of this object belongs to one of the two
following types of connection: Explicit connection, allowing
Explicit Messages
to be sent, or
I/O Connections
. This object is described in chapter 5-4 of
volume I of the DeviceNet specifications.
Here is a brief description of the four instances of the I-7242D’s
“Connection” object, and then details are given in the rest of this chapter:
Instance ID Type of connection
Connection name
0x01
Explicit Messaging Explicit Connection
0x02
I/O Connection
Polled Command/Response Connection
0x03
I/O Connection
Bit-Strobed Command/Response Connection
0x04
I/O Connection
Change-of-State / Cyclic (Acknowledged) Connection
Class Attribute
Attribute ID
Attribute Name
Data Type
Method
Value
0x01 Revision UINT Get 1
Class Service
Service Code
Service Name
Need
0x0E Get_Attribute_Single
Required
Instance (0x01) Attribute: Explicit Connection
Attribute ID
Attribute Name
Data Type
Method
Value
0x01
State
USINT
Get
0x00 to 0x05
0x02 Instance
type USINT
Get
0x00
0x03
Transport class trigger
BYTE
Get/Set
0x83
0x04
Produced connection id
UINT
Get/Set
Table 3-2
0x05
Consumed connection id
UINT
Get/Set
Table 3-2
0x06
Initial comm. characteristics
BYTE
Get/Set
0x21
0x07
Produced connection size UINT
Get/Set 0x84
0x08 Consumed
connection
size UINT Get/Set 0x84
