Subscribe and Unsubscribe Types and Functions

The subscribeValues and unsubscribeValues methods allow subscribing and unsubscribing for changes of value of one or multiple properties in a Desigo CC system.

It is possible to:

• Specify a fixed list of objects to whom to subscribe.
• Set up a filter so that the subscription will be dynamically applied to all the objects that satisfy the filter criteria. When a property changes value, the callback method provided as parameter will be invoked.
• Subscribe multiple times. For unsubscribing, it is necessary to provide the result of invoking subscribeValues.