Rockwell Automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CONC(OR.DU1 - Manual (Page 44)

Operating a Backup System
Chapter 3
3-4
Figure 3.1
Example Rung for Performing Memory Download at Startup
DN
Message
Control
Channel
Download
#B0:0
E2.14.1
05
ER
B1:0 S0:3
Inputs
00 17
EN
MSG
To shut down a backup system, do the following:
1. Select program load mode in the primary processor.
2. Select program load mode in the backup processor.
3. Turn off the backup processor.
4. Turn off the primary processor.
If you followed the shutdown procedure previously described, you can
restart the backup system by doing the following:
1. Turn on the primary processor.
2. Turn on the backup processor.
3. Select run mode in the backup processor.
4. Select run mode in the primary processor.
Shutting Down
a Backup System
Restarting
a Backup System