Allen-Bradley 1769-SDN, Installation Instructions Manual, Page: 51 / 68

Rockwell Automation Publication DNET-IN001B-EN-P - January 2012 51
1756 DeviceNet Status Indicators and Data Structures Appendix A
1756-DNB DeviceNet
Scanner Data Structures The 1756-DNB scanner module supports several sizes of input, output, and
status structures over the ControlLogix backplane. These I/O structures were
created to reduce the complexity of connecting DeviceNet I/O and status data
with ladder programs.
The module creates all three structures whether DeviceNet devices are
configured or online.
RSLogix 5000 software directs the controller to connect to these predefined
default I/O structures. The controller automatically performs periodic updates of
the structures on a cyclic basis.
RSNetWorx for DeviceNet software configures scan list map segments that are
used to copy specific portions of I/O data between the I/O structures and
DeviceNet network packets.
92 The DeviceNet cable is not supplying power to the device’s
communication port. • Verify that the network’s 24V DC power supply is operating
properly.
• Verify the cable is in good condition.
• Check the cable connections to the device.
95 A device’s firmware is being updated or a configuration is
being downloaded. None. Do not disconnect the device while the update is in
process because existing data in the device memory will be
lost.
96 The communication port is in Test mode. None.
97 The controller has placed the scanner in Halt mode. If the O.CommandRegister.HaltScanner bit is on, turn it off.
Then cycle scanner power.
98 General firmware error. Replace device.
99 System failure. Replace device.
Table 7 - Status Codes
Status Code Description Recommended Action
IMPORTANT
Only one Logix controller at a time can send outputs to the 1756-DNB
scanner module.