User Manual

Global objects and functions

Roles in the system

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Xworks Plus (XWP) and all BACnet clients can only modify the data of global

objects in the primary server.

7.2 Roles in the system

The role of the primary server

Server/Function Function and description

Primary server (Desigo PX) One automation station of a site acts as the primary server. Make sure that only one primary

server exists at any one time on a site.

Life check The primary server monitors the backup servers and the third-party BACnet devices of a site.

The primary server can monitor the Desigo room automation server.

Time synchronization The primary server synchronizes the time of the backup servers and the third-party BACnet

devices of the site.

The primary server can synchronize the Desigo room automation server time.

Start-up No coordinated start-up.

Replication The primary server replicates the global objects and properties (device object) to the backup

servers of a site. A backup server accepts changes of global objects only from the primary server.

The role of the backup server

Server/Function Function and description

Backup server (Desigo PX) The other automation stations of a site must be backup servers.

Life check The backup servers monitor the primary server of the site.

Backup servers can monitor Desigo room automation servers.

Time synchronization The backup server can synchronize the time of the Desigo room automation server and of the

third-party BACnet devices.

Start-up No coordinated start-up.

Desigo PX

PXM30/40/50Desigo CC

Primary Server Backup Server Backup Server

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