User Manual

Working with Projects
Assign and configure poll-groups with care. High poll-interval frequency affects
the performance.
Usage of the following properties on tags will reduce performance. The tag should
not:
• be an array tag
• be connected to more than one controller
• be used in script mode
• be a system tag
• use data exchange
• use any of these properties:
– Access Right (other than ReadWrite)
– Offset
– Gain
– Read expression
– Write expression
– Non volatile
– Index register
– Log to audit trail
Screens
Optimizing screen update time minimizes CPU load and flash operations. This
can make a significant difference in graphic-intense projects that approach the
limits of the panel’s capabilities.
Screen changes are carried out most efficiently through a show screen action, either
on a function key or an object.
Screens with less content will in general lo ad faster. Certain objects will take
longer to load, such as an alarm viewer. If screens are frequently shown or used as a
background, try to keep it as slim as possible.
Caching of screens have a great impact on screen switching times. The more
screens that can be cached the more screens will load faster, hence it is preferred
to keep RAM as low as possible to utilize it for screen caching. Large screens will
take up more memory when cached and will possibly prevent smaller and more
frequently used screens from being cached. It is possible to prevent screens from
beingcachedbysettingitsCached property to false. When utilized RAM reaches
approximately 85% the application will start to remove screens from the cache in
order to avoid the application from running low on memory. This implies that if
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