1. Configure the On-call schedule, tags, and communication ports on one of the station where ALERT is installed. This station will be called “Main station”.
2. Then on both stations, on the redundancy tab of the menu Configuration\Option, tick the option “Active with the station", and fill in the computer name (or IP address) with which it must be redundant. For example, on the main station you should fill in the name of the redundant station and on the redundant station the name of the main station.
3. On the main station, tick the checkbox “Main station”.
4. Select “TCP/IP“and change the port number only if this number is used by another application.
5. In the Automatic synchronization options, leave "Synchronization at launching", “Synchronization on most recent configuration" and "Alarm synchronization" blank. The first two options will be validated after we have setup the redundancy. The option "Alarm synchronization" is useful only when the supervisor runs on only one of two stations and not on both.
6. Then on the redundant station, in the "File" menu, select "Open" and tick "Remote configuration" and tick the "Parameters", "Supervision" and "Groups & Teams" checkboxes.
7. We must then define the communication ports on the redundant station.
8. When redundancy is established between the two stations, you can then tick the options “Synchronization at launching” and "Synchronization on most recent configuration”.
After these handlings, the two stations operate in redundancy. Normally, the supervision LED should be green on both stations; this must also be true for the redundancy LED. In addition, the on-call (Alert) LED should be green on the active station and red on the redundant station. In case of failure of the main station, ALERT switches to the redundant station. At that moment, the three LEDs of the redundant station turn green and on the main station the on-call (Alert) LED turns red as well as either the supervision or COM LED depending on which one is failing.