Rockwell Automation 1769-SDN Compact I/O DeviceNet Scanner Module User Manual - Manual (Page 132)

132 Publication 1769-UM009E-EN-P - August 2009
Appendix B CompactLogix Backup on the DeviceNet Network
Configure the Backup
System Follow these steps to configure a CompactLogix backup system on the
DeviceNet network. Some of these steps are described in greater detail in the
rest of the appendix.
1. Install all I/O and operator interfaces that you need to back up on the
DeviceNet network.
We recommend that you reserve node addresses 0 and 1 for the two
1769-SDN scanner modules used with the CompactLogix controllers
within a backup system. If you do not use 0 and 1, make sure you
reserve two consecutive numbers for the 1769-SDN scanner modules
when you install I/O and other devices on the DeviceNet network.
2. Connect a CompactLogix controller with a 1769-SDN scanner module
to the DeviceNet network.
3. Set the scanner module node address to 0 (or the lower of the two node
addresses reserved for the CompactLogix controller backup system).
4. Apply power to the controller and the network.
5. Use RSNetWorx for DeviceNet software to download the network’s
scanlist to the 1769-SDN scanner module.
You can either use a scanlist from a new configuration or from a
previously-used configuration. If the scanlist is a new configuration, we
recommend that you save it to a new project for later use.
6. Use RSLogix 5000 programming software to download the appropriate
user program to the CompactLogix controller.
The program should contain the explicit messages that enable the
backup feature for this controller and scanner module. The messages are
described in the
Develop the CompactLogix Backup Application section
beginning on page 134 .
7. Put the controller into Run mode.
8. Either disable power to the controller or disconnect the scanner module
from the DeviceNet network.
This controller will be the secondary controller.