setting for spare controller AC800M PM 861 to replace a backup controller in redundant mode.
I already download the same firmware and what next step
Installation procedure is described in AC800M Controller HW manual (3BSE036351...).
You are going to need IPConfig Tool, but:
"Do not connect the IPConfig tool to the backup CPU. Configuration of IP addresses are always done via the primary CPU. No configuration of backup IP addresses is possible from the Control Builder. Backup IP addresses may be configured even if the backup CPU is not connected."Use the Help function of the IPConfig Tool, it will definitely help you.