Rockwell Automation 1794-L34 FlexLogix Controller System User Manual - Manual (Page 106)

Publication 1794-UM001G-EN-P - January 2007
106 FlexLogix Back-Up on DeviceNet
Power-Up and
System Start-up To configure a FlexLogix Back-up system on DeviceNet, you can take
the following steps. 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 DeviceNet.
We recommend that you reserve node addresses 0 and 1 for the
two FlexLogix controllers used in the back-up. If you do not use
0 and 1, make sure you reserve two consecutive numbers for the
controllers when you install I/O and other devices on
DeviceNet.
2. Connect a FlexLogix controller with a 1788-DNBO scanner to
the DeviceNet network.
3. Set the controller node address to 0 (or the lower of the 2 node
addresses reserved for the FlexLogix controllers).
4. Power-up the controller and the network.
5. Use RSNetWorx for DeviceNet to download the network’s
scanlist to the 1788-DNBO card.
You can use either a scanlist from a new configuration or
previously-used configuration. If the scanlist is a new
configuration, we recommend you save it to a new project for
later use.
6. Use RSLogix5000 software to download the appropriate user
program to the FlexLogix controller.
The program should contain the explicit message(s) that enable
the back-up feature for this controller and scanner. The
messages are described in the Developing the FlexLogix
Back-Up Application section beginning on page 108.
7. Put controller into RUN mode.
8. Either disable power to the controller or disconnect the scanner
from DeviceNet. This controller will be the secondary controller.