User Guide

Trends
Trends Reference
7
228 | 393
Siemens
User Guide Version 3.0
A6V10415471
Building Technologies
2017-11-30
7.2.7 Offline Trendlog Objects
Offline trend data can be recorded and saved by Trendlog objects within the
automation and control system even when the management station is not
connected. The recorded data can then be saved in the trend database. Offline
trend data can be retrieved and displayed in the Trend View.
Creating or Deleting BACnet Trendlog Objects Online
Creating and deleting BACnet objects online provides greater flexibility for adapting
projects during operation. In other words, you can create and delete BACnet
objects without engineering tools from the applicable manufacturer. The
corresponding BACnet function must be supported by the automation station from
the given manufacturer.
Figure 20: Offline Trendlog Object
NOTE:
Trendlog or Trendlog multiple objects that are created permanently with the
engineering tool cannot be deleted from the management station.
NOTICE
Validated Projects
Specific critical environments (for example, pharmaceutical installations and
processed) require a high degree of safety and traceability of all operational
workflows and user activities. A validated plant can lose its validity or must be
revalidated by adding or losing BACnet objects. Therefore, do not use this
function, or do not enable it in the application rights.
Create object
Delete object
Upload data manually
Upload data automatically
Macro
Reaction
Field data upload
Trendlog Trendlog
Created
Tool
Device
Management
station