Connection object – Rockwell Automation 22-COMM-D DeviceNet Adapter User Manual

Page 112

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C-4

DeviceNet Objects

Class Code

Instances

Instance Attributes

Refer to the DeviceNet Specification for more information.

Connection Object

Hexadecimal Decimal
0x05

5

Instance

Description

1

Master-Slave Explicit Message Connection

2

Polled I/O Connection

4

Change of State/Cyclic Connection

6 – 10

Explicit Message Connection

Attribute
ID

Access
Rule

Name

Data Type

Description

1

Get

State

USINT

0 = Nonexistent
1 = Configuring
2 = Waiting for connection ID
3 = Established
4 = Timed out

2

Get

Instance Type

USINT

0 = Explicit Message
1 = I/O Message

3

Get

Transport Class
Trigger

USINT

The Transport Class Trigger for
this instance

4

Get

Produced Cnxn
ID

USINT

CAN Identifier to transmit on

5

Get

Consumed Cnxn
ID

USINT

CAN Identifier to receive on

6

Get

Initial Comm
Char

USINT

Defines the DeviceNet message
groups that the tx/rx Cnxn’s apply

7

Get

Produced Cnxn
Size

UINT

Max bytes to transmit across this
connection

8

Get

Consumed Cnxn
Size

UINT

Max bytes to receive across this
connection

9

Get/Set EPR

UINT

Expected Packet Rate
(timer resolution = 2 msec.)

12

Get/Set Watchdog Action USINT

0 = Transition to timed out
1 = Auto delete
2 = Auto reset

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