Rockwell Automation 1756-DNB ControlLogix DeviceNet Scanner Module Installation Instructions User Manual
Page 41
ControlLogix DeviceNet Scanner Module 41
Publication
1756-IN566D-EN-P - June 2008
Module Status Register Bit Definitions
The Module Status Register bits are defined as follows
Status Structure
The controller receives status information concerning the 1756-DNB scanner
module’s ability to exchange DeviceNet messages with other nodes by reading
from the status structure in the 1756-DNB scanner module. The scanner
module periodically updates the contents of the status structure and copies its
contents to the controller. The status structure consists of several tables. The
bit position of each of the 64 bits that make up a given status table directly
corresponds to the node address of a device.
Bit
Name
Description
0
Run
1 = in Run mode
0 = in Idle mode
1
Fault
1 = Network is faulted
2
DisableNetwork
1 = Network is disabled
3
DeviceFailure
1 = Device failure exists (examine the status structure
for causes)
4
AutoverifyFailure
1 = At least one device has failed to be initialized by
the scanner
5
CommFailure
1 = Communication failure exists
6
DupNodeFail
1 = Failure due to duplicate node address
7
DnetPowerDetect
1 = DeviceNet power failure
8
NetworkWarning
1 = Scanner has detected numerous receive and/or
transmit errors -- check the integrity of the DeviceNet
network
9...31
{Reserved}
Unused