Adapter input status word – Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual
Page 78
Publication 1794-6.5.8 - January 2010
78 Communication and I/O Image Table Mapping with the DeviceNet/ControlNet Adapter
Adapter Input Status Word
The input status word consists of:
•
I/O module fault bits – 1 status bit for each slot
•
node address changed – 1 bit
•
I/O status – 1 bit
The adapter input status word bit descriptions are shown in the fol-
lowing table.
Possible causes for an I/O Module Fault are:
•
transmission errors on the FLEX I/O backplane
•
a failed module
•
a module removed from its terminal base
•
incorrect module inserted in a slot position
•
the slot is empty
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.
15
Bit:
0
1
2
3
4
5
6
7
8
10 through 15
I/O Module Fault Bits
Node Address Changed Bit
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
9
I/O State Bit
Not Used
Bit Description
Bit
Explanation
I/O Module Faults
0
This bit is set (1) when an error is detected in slot position 0.
1
This bit is set (1) when an error is detected in slot position 1.
2
This bit is set (1) when an error is detected in slot position 2.
3
This bit is set (1) when an error is detected in slot position 3.
4
This bit is set (1) when an error is detected in slot position 4.
5
This bit is set (1) when an error is detected in slot position 5.
6
This bit is set (1) when an error is detected in slot position 6.
7
This bit is set (1) when an error is detected in slot position 7.
Node Address Changed
8
This bit is set (1) when the node address switch setting has been
changed sing power up.
I/O State
9
Bit = 0 – idle
Bit = 1 – run
10 thru 15
Not used – sent as zeroes.