About HMI server redundancy
To minimize data loss and down time, and to help ensure that critical parts of a control system remain available to connected clients,
FactoryTalk View SE
provides features such as server status monitoring and support for online changes.In process monitoring and control automation, redundancy refers to the ability of the system running the process to continue working correctly, when parts of the system become unavailable or fail.
You can set up HMI redundancy in network distributed applications only. One computer in the pair hosts the primary server, and the other hosts the secondary server. In the event that the primary HMI server cannot provide service to application clients, the system switches to the secondary server, and
FactoryTalk View SE
Clients continue to function normally.At runtime, the clocks on the computers that the primary and secondary servers are running on need to be synchronized. Synchronizing can be done automatically in Windows with a time server. See Windows Help for details.
At runtime, you can change the HMI project components in an application while it is running. For example, you can add, modify or delete graphic displays and other components, and have those changes to take effect at connected clients.
To automatically save the project online edits to both active and standby servers, in
FactoryTalk View Studio
, from the menu, select Tools
> Options
. On the Settings
tab, make sure the Save edits to both active and standby HMI servers
option is selected. To keep the HMI memory tag values the same on both active and standby servers, on the same tab, select the Auto synchronize HMI memory tag values to both active and standby HMI servers
option.Provide Feedback