Publication 1734-UM002C-EN-P - July 2003
What is the 1734-ADN(X) Adapter? 2-21
See Table 2.A for definitions of the first 2 bytes of each I/O message
produced by the adapter on DeviceNet.
The first 2 bytes of output data on the DeviceNet network that are sent
to the adapter are reserved as a command word. No bits have
been defined.
Table 2.A
I/O Status Word Bit Definitions
Bit Operating Mode Operating Mode Description
0 0 = Run mode
1 = Idle mode
Run - The adapter maps output data to
each module on PointBus.
Idle - Output data with zero length is
sent to I/O modules.
Device Failure - One or more of the
devices in the scan list has failed to
communicate with the adapter.
Communications Failure - The
adapter has entered the BUSOFF state
on the Subnet. Another Subnet device
is configured with the wrong baud rate.
Duplicate Node Address Failure -
There is another node with the same
address (0) as the scanner on the
Subnet, and the adapter has failed its
DupMAC test.
1 1 = Device failure (at least one
device failed)
2 1 = Communication failure
3 1 = Duplicate node
address failure
4 Reserved
5 Reserved
6 Reserved
7 Reserved
0 Reserved
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Reserved
6 Reserved
7 Reserved
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