Rockwell Automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter - Manual (Page 27)

Publication 1769-UM001B-EN-P - October 2002
How Communication Takes Place and I/O Image Table Mapping 2-3
The adapter status bit descriptions are shown in the following table.
Possible causes for an I/O Module Data Invalid are:
• transmission errors on the Compact I/O backplane
• a failed module
• incorrect module inserted in a slot position
• the configuration for an I/O module is invalid
The node address changed bit is set when the node address switch
setting has been changed since power up. The new node address
does not take affect until the adapter has been powered down and
then powered back up.
Bit Description
Word 0
Bit
Is set (1) when
I/O module data
is invalid for
slot position
Bit Description
Word 1
Bit
Is set (1) when
I/O module data
is invalid for
slot position
I/O Module
Data Invalid
0 1
I/O Module
Data Invalid
0 17
1 2 1 18
2 3 2 19
3 4 3 20
4 5 4 21
5 6 5 22
6 7 6 23
7 8 7 24
8 9 8 25
9 10 9 26
10 11 10 27
11 12 11 28
12 13 12 29
13 14 13 30
14 15 Node Address
Changed 14 1 -
15 16 Not Used 15 2 -
1 This bit is set (1) when the node address switch setting
has been changed since powerup.
2 Not used - sent as zeroes.