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Siemens
PXM20 / PXM20-E operator unit
CM110754en_02
Building Technologies
Trend function and settings
17 Dec 2009
10
Trend function and
settings
The PXM20 operator unit provides the user with five channels for
trend logging, enabling five data points to be logged.
The same dialog box is used for basic trend settings in all types of
trend view (refer to Section 10.3). This dialog box is invoked when
you set up a new data point (see Section 10.1). For channels which
have already been set up, it can also be invoked by selecting
Alarming & functions
/
Online Trend
(see Section 10.2).
There are three separate approaches to the trend view:
Graphic view (Section 10.3.2)
Graphic view online (Section 10.3.3)
List view (Section 10.3.4)
10.1
Setting up a new trend
Navigate to the data point for which you want to log a trend. Display
the information dialog box.
Figure 10-1 Information
Use the
LOG DATA POINT
button to set up the required trend. The
dialog box with the trend settings opens (Figure 10-3). Section 10.3
describes how to set the trend parameters and define the type of
view required.<0}
The data point is automatically assigned to the first free channel.
