User Guide

8
Trends
Offline Trendlog Objects
202
Siemens User Guide Version 2.1 A6V10415471_en_a_21
Building Technologies 2015-07-15
8.6.1 Creating Offline Trendlog Object
 The device supports the creating offline Trendlog objects without an
engineering tool.
 You are in System Browser, and Trend is closed.
1. In System Browser, select the corresponding data point.
2. Select Related Items tab and click New Trend.
 The Secondary pane opens.
3. On the data point, right-click and select Create Trendlog Object in BACnet
Device.
4. In the Create BACnet Trendlog Object dialog box:
– Type an unique name to the offline Trendlog object.
– Select the device where you store the offline Trendlog object.
– Type 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 logging type
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 the System Browser after 10
– 60 seconds (folder Trends > Offline Log Objects > [own path structure]).
8.6.2 Creating Offline Trendlog Multiple Object
 The device supports creating offline Trendlog multiple objects without an
engineering tool.
 You are in System Browser, and Trend is closed.
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.
5. In the Create BACnet Trendlog Object dialog box:
– Type an unique name to the offline Trendlog multiple object.