Allen-Bradley DeviceNet 1756-DNB - Output Data Image; Compactlogix Status Structure

64 Rockwell Automation Publication DNET-IN001B-EN-P - January 2012
Appendix B 1769 DeviceNet Modules Status Indicators and Data Structures
Output Data Image
The output data image is transferred from the controller to the scanner module.
The following table shows the bit descriptions for the module’s command array.
CompactLogix Status Structure
The second area of the CompactLogix controller input image is the Status
Structure. The status structure consists of these data elements.
Word Description Data Type
0 and 1 Module Command Array 2-word array
2…181 Output Data Image 180-word array
Word Bit Operating Mode
0 0 1 = Run, 0 = Idle
11 = Fault
2 1 = Disable Network
3 Reserved
(1)
(1) Do not manipulate reserved bits. Doing so may interfere with future compatibility.
4 1 = Reset
5…15 Reserved
(1)
1 0…15 Reserved
(1)
Description Data Type
I.Status.Scan Counter 2 words
I.Status.Device Failure Register 64-bit array
I.Status.Autoverify Failure Register 64-bit array
I.Status.Device Idle Register 64-bit array
I.Status.Active Node Register 64-bit array
I.Status.Status Display 8 bytes
I.Status.Scanner Address 1 byte
I.Status.Scanner Status 1 byte
I.Status.Scrolling Device Address 1 byte
I.Status.Scrolling Device Status 1 byte
I.Status.Device Status 64 bytes