Allen-Bradley ControlLogix DeviceNet 1756-DNB - Page 24

24 ControlLogix DeviceNet Scanner Module
Publication 1756-IN566B-EN-P - April 2001
The status structure consists of these data elements:
Status Structure
Element
Description Data Type DINTS
ScanCounter counter incremented each I/O scan 32-bit 10
DeviceFailureRegister device failed bit table; 1 = failed 64-bit
AutoverifyFailureRegister device I/O size does not match
scanner’s internal table; 1 = mismatch
64-bit
DeviceIdleRegister device is idle bit table; 1 = idle 64-bit
ActiveNodeRegister node online bit table; 1 = online 64-bit
StatusDisplay ASCII representation of DNB
alphanumeric display
4-byte
ScannerDeviceStatus Scanner device status: 4-byte binary 11
ScannerAddress DeviceNet address of DNB module 8-bit binary
ScannerStatus status of 1756-DNB module 8-bit binary
ScrollingDeviceAddress scrolls through DeviceNet nodes once
per second by address and status
(0 = no faults).
8-bit binary
ScrollingDeviceStatus 8-bit binary
ReservedArray future expansion (20 bytes) 20 x 8-bit 16
DeviceStatus DeviceNet node status array,
byte per device
64 x 8-bit 24/32