I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 70/124
7 DeviceNet Communication Set
7.1
DeviceNet Communication Set Introduction
The I-7242D is a “Group 2 Only Slave” device, and supports the
“Predefined Master/Slave Connection Set”. To communicate with this device,
the process for establishing a connection is important. In addition, we provide
some examples on how to access I/O devices.
The CAN Identifier Fields associated with the Predefined Master/Slave
Connection Set for the I-7242D are given in the table 7-1. This table defines
the Identifiers that are to be used with all the connection based messaging
involved in the Predefined Master/Slave Connection Set for the I-7242D.
Table 7-1 CAN Identifier Fields for the I-7242D
IDENTIFIER BITS
10 9 8 7 6 5 4 3 2 1
0
IDENTITYUSAGE
HEX
RANGE
0
Group 1
Message ID
Source MAC ID
Group 1 Messages
000 –
3ff
0 1 1 0 1
Source MAC ID
Slave’s I/O Change of State or Cyclic Message
0 1 1 1 0
Source MAC ID
Slave’s I/O Bit–Strobe Response Message
0 1 1 1 1
Source MAC ID
Slave’s I/O Poll Response or Change of
State/Cyclic Acknowledge Message
1 0
MAC ID
Group 2
Message ID
Group 2 Messages
400 –
5ff
1 0
Source MAC ID
0 0 0
Master’s I/O Bit–Strobe Command Message
1 0
Destination MAC ID
0 1 0
Master’s Change of State or Cyclic Acknowledge
Message
1 0
Source MAC ID
0 1 1
Slave’s Explicit/ Unconnected Response
Messages/
Device Heartbeat Message/ Device
Shutdown Message
1 0
Destination MAC ID
1 0 0
Master’s Explicit Request Messages
1 0
Destination MAC ID
1 0 1
Master’s I/O Poll Command/Change of State/Cyclic
Message
1 0
Destination MAC ID
1 1 0
Group 2 Only Unconnected Explicit Request
Messages (reserved)
1 0
Destination MAC ID
1 1 1
Duplicate MAC ID Check Messages
1 1 1 1 1 Group 4 Message ID
Group 4 Messages
000 –
3ff
1 1 1 1 1
2C
Communication Faulted Response Message
1 1 1 1 1
2D
Communication Faulted Request Message
