User Guide

Trends
Working with Trends
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Siemens
User Guide Version 3.0
A6V10415471
Building Technologies
2017-11-30
NOTE: The Create Trendlog Object in BACnet Device option is not available if
you select an object which is not of type BACnet.
4. In the Create BACnet Trendlog Object dialog box:
– Enter a unique Trendlog Object Name.
– Select the Device where you store the offline Trendlog object.
– Enter the Buffer size from 0‒500.
– Select the Logging Type:
Polled: The data entry is polled periodically as per the settings in Logging
interval, Align intervals, and Interval offset.
COV: The data entry is carried out when the trended property is changed.
Trigger: Triggered when Trigger = On, a data entry is made for the data
series.
Empty: Default initiated by device.
NOTE: If a particular device does not support a certain initial Logging Type
value, then the default value is used.
When the Logging Type is polled, enter the Log Interval cycle time
(seconds) used to log values of an external data source in the trend log
buffer.
5. Click OK.
 The offline Trendlog object is created.
6. Click OK.
 The offline Trendlog object is saved and visible in System Browser after 10 –
60 seconds in the folder Trends > Offline Log Objects > [own path structure].
7.1.2.2 Creating Offline Trendlog Multiple Object
 The device supports creating offline Trendlog multiple objects without an
engineering tool.
1. In System Browser, select the first corresponding data point.
2. Select Related Items tab and click New Trend.
 The Secondary pane opens.
3. In System Browser, select further data points and add those with drag-and-
drop to the Trend View.
4. Select all these data points, right-click and select Create Trendlog Multiple
Object in BACnet Device.
NOTE: The Create Trendlog Multiple Object in BACnet Device option is not
available if you select an object which is not of type BACnet.
5. In the Create BACnet Trendlog Object dialog box:
– Complete the Name field for the offline Trendlog multiple object.
– Select the device where you store the offline Trendlog multiple object.
– Enter the buffer size from 0‒500. The buffer space used per value is the
same for all data formats.
– Select the Logging Type:
Polled: The data entry is polled periodically as per the settings in Logging
interval, Align intervals, and Interval offset.
Trigger: Triggered when Trigger = On , a data entry is made for the data
series.
Empty: Default initiated by device.
NOTE: If a particular device does not support a certain initial Logging Type
value, then the default value is used.