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7.2
Examples on the DeviceNet Communication Set
7.2.1
Request the use of Predefined Master/Slave Connection Set
An unconnected explicit messaging request sent by the Master node via a
destination node's Group 2 Only Unconnected Explicit Request Message to
requests the use of the Predefined Master/Slave Connection set. The example
shows how to use these connection sets. In this demo, the Master establishes
the Explicit Message, Poll IO and Bit-Strobe IO connections.
Table 7-3 shows the Group 2 Only Unconnected Explicit connection
Identifier Fields.
Table 7-3 Identifier fields of the group 2 only unconnected explicit connection
IDENTIFIER BITS
10
9
8
7
6
5
1
0
Source MAC ID
1
0
Destination MAC ID
Note: Slave (I-7242D): Node ID=0x09, Master: Node ID=0x0A
Allociation Choice : Explicit
Master (MAC ID =0x0A)
_ Group 2 Message
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_ Destination MAC ID=0x09
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_ Message ID =6
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ID=10 001001 110. Data= 0A
_ Group 2 Message
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_ Source MAC ID=0x09
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_ Message ID =3
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ID=10 001001 110. Data= 0A CB 00
I-7242D DeviceNet/Modbus RTU Gateway User's Manual, July 2006, Version 1.1
4
3
2
1
0
0
1
1
Slave's Explicit/ Unconnected Response Messages
1
1
0
Group 2 Only Unconnected Explicit Request
Messages
、
Polled & Bit-Strobed
_ Frag=0. Transaction ID=0. Souce MAC ID= 0x0A
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_
Service=Allocate_Master/Slave_Connection_Set Request
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| _ Class ID=3
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| | _ Instance ID=1
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| | | _ Allocation Choice=Explicit, Polled & Bit Strobed
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| | | |
_ Allocator's MAC ID=0x0A
4B
03 01 07 0A
_ Frag=0. Transaction ID=0. Destination MAC ID= 0x0A
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_ Service=Allocate_Master/Slave_Connection_Set Response
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| _Connection Message Body Format = DeviceNet (8/8)
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I-7242D user manual
IDENTITY USAGE
Slave (MAC ID =0x09)
HEX
RANGE
73/124
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