Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 82)

Operating Your PLC-5 Backup System
Chapter 5
5-18
After you have checked your program for proper data to be transferred, and
have developed the transmitting and receiving programs, you can start the
backup system.
To start the backup system:
1. Apply power to the primary system.
2. Apply power to the secondary system.
3. Load the application program and the remote I/O configuration in the
primary PLC-5 processor by addressing node n.
4. Test the system.
5. Load the application program and the remote I/O configuration in the
secondary PLC-5 processor through node n+1.
6. Test the system.
7. Switch the primary and the secondary PLC-5 processors to RUN mode.
Starting the Backup System