Catalog

1-5
Siemens Switzerland Ltd http://www.siemens.com/buildingtechnologies-productcatalog 2015
Building Technologies Division
1
Fully integrated trend data processing allows effortless evaluation and analysis of real-time (online) data and (offline) historical data.
The trend feature facilitates the monitoring and fine-tuning of the plant. In the Desigo system, this feature is implemented in the form of
Trendlog and TrendlogMultiple objects, in compliance with the BACnet standard.
Trend logging options Sampling options
• Continuous logging • Polling
• Single run • COV polling (Change of Value)
• Logging over a specified period • Event-driven polling
Trend graphs can be displayed on the Desigo management platform. In addition, the touch panels PXM40/PXM50 and operator units
PXM20 as well as PX-Web can display Desigo PX trend graphs. The management platform Desigo CC allows clear trend comparison e.g. to
help finding the cause of energy inefficiency.
Trend viewer on the management platform Desigo CC and on the touch panels PXM40/PXM50
Online trend features Offline trend features
• Real-time display of process data • Offline data display – no permanent connection required
• Longer periods of time (days, months)
• Based on changes in the value of a data point (COVs) or on
periodic sampling by Trend Viewer (times can be configured)
• Data acquisition in the automation system
• Data are uploaded to the management level at regular
intervals or as needed
System functions
Trend and history function