System Switchover

Powering the Standby CPU and Performing a Switchover

Once the Standby CPU coprocessor firmware and OS are updated, proceed as follows:

Step	Action
1	When using an application in the PCMCIA: Insert the PCMCIA batteries. Insert the PCMCIA card in the Standby CPU.
2	Power on the Standby CPU. NOTE: The CPU must be in the No Conf state.
3	Reconnect all the communication cables (CRP module, Ethernet cables, …) except the HSBY Link fiber optic cable.
4	At last, connect the HSBY Link fiber optic cable.
5	Check that the application program is automatically transferred to the Standby CPU. If not, perform the transfer with the keyboard. NOTE: Verify that the Modbus or Modbus Plus address is the same as the address noted when preparing the Hot Standby system for update.
6	Put the CPU in RUN mode. Verify that the Primary CPU is in RUN Primary mode, and the Standby CPU is in RUN Standby mode.
7	Perform a switchover by stopping the Primary CPU with the keyboard. NOTE: Verify that the Standby CPU becomes the Primary CPU (check the LCD screen).