Rockwell Automation Publication 825-UM004D-EN-P - April 2012 253
DeviceNet Information Chapter E
Instance 4 is the Predefined Group 2 Connection Set Change of State/Cyclic IO
Message Connection. The following Instance 4 attributes are supported:
Attribute ID Access Rule Name Data Type Value
1 Get State USINT 0 = nonexistant
1 = configuring
3 = established
4 = timed out
2 Get Instance Type USINT 1 = I/O Connection
3 Get Transport Class Trigger USINT 0x00 (Cyclic, unacknowledged)
0x03 (Cyclic, acknowledged)
0x10 (COS, unacknowledged)
0x13 (COS, acknowledged)
4 Get Produced Connection ID UINT 01101xxxxxx
xxxxxx = node address
5 Get Consumed Connection ID UINT 10xxxxxx101
xxxxxx = node address
6 Get Initial Comm Characteristics USINT 0x02 (acknowledged)
0x0F (unacknowledged)
7 Get Produced Connection Size UINT 0 to 8
8 Get Consumed Connection Size UINT 0 to 8
9 Get/Set Expected Packet Rate UINT in milliseconds
12 Get Watchdog Action USINT 0 = transition to timed out
1 = auto delete
2 = auto reset
13 Get Produced Connection Path Length UINT 8
14 Get Produced Connection Path 21 04 00 25 (assy inst #) 00 30
03
15 Get Consumed Connection Path Length UINT 8
16 Get/Set Consumed Connection Path 21 04 00 25 (assy inst #) 00 30
03
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