Rockwell Automation Allen-Bradley ControlLogix DeviceNet 1756-DNB User Manual page 88

A-2 1756-DNB Status Structure
Publication 1756-6.5.19 - May 2000
The Status Structure consists of these data regions:
Status Structure
Scan_Counter
Device_Failure_Register
Autoverify_Failure_Register
Device_Idle_Register
Active_Node_Register
Status_Display
Scanner_Device_Status
scanner_address
scanner_status
device_address
device_status
Reserved_Array
Device_Status_Array
The 1756-DNB, versions 3.002 and higher, and RSLogix 5000, versions
2.25 and higher, support variable size Status Structures.
When the user specifies the size of the Status Structure during the
1756-DNB Module Properties configuration (see page 6-6), the
elements of the structure correspond the definition of the Status
Structure up to the size selected.
Element Description
counter incremented each I/O scan
device failed bit table; 1 = failed
device I/O size does not match scanner's
internal table; 1 = mismatch
device is idle bit table; 1 = idle
Node online table; 1 = online
ASCII representation of DNB
alphanumeric display
Scanner Device Status:
DeviceNet address of DNB module
Status of DNB module
Scrolls through faulted DeviceNet nodes
by address (0 = no faults)
Future Expansion (20 bytes)
DeviceNet node status, 1 byte per device
Data Type DINTs
32-bit 10
64-bit
64-bit
64-bit
64-bit
4-byte
4-byte BCD 11
8-bit BCD
8-bit BCD
8-bit BCD
8-bit BCD
20 8-bit 16
64 8-bit 24/32