RSView Supervisory Edition Installation Guide

• • • • •RSVIEW SUPERVISORY EDITION USER’S GUIDEUsing multiple events componentsYou can create multiple events components, for example, to group events that need to beevaluated at different rates. Each HMI server in an distributed application can run up to 20event components, with up to 1,000 tags in each component.Do not create events that depend on other events. Events are not processed sequentially.Editing eventsYou can edit events during development or when you run the application. If you changethe event component while running the application, the changes don’t take effect until thecomponent is stopped and then restarted.About the maximum update rateThe maximum update rate is the fastest rate at which event expressions in the eventcomponent can be evaluated. It also determines the fastest rate at which data servers cansend changes in tag values. When setting the maximum update rate, remember to:• set the update rate separately for each event component.• set the update rate as fast as, or faster than, the rate at which the values of tags used inthe expressions change, unless it is desirable to miss changes in tag values.Starting and stopping event processingThere are many ways to start and stop event processing. Choose the way that works bestfor the application. For information about RSView command syntax, see Appendix A,RSView commands, or see Help.Ways to start event processingTo start event processing, use any of these methods:• In the HMI Server Properties dialog box, click the Components tab, select the Eventscheck box, and then select an event component. The event component will start thenext time the HMI server runs, or when the HMI server’s components are startedmanually.• In the Macros editor, create a macro that contains the command, EventOn. In the HMI Server Properties dialog box, click the Components tab,select the Macro check box, and then specify the macro. Event detection will startwhen the HMI server runs.14-4