User Manual

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Building Technologies Operating Instructions for ACS Operating and ACS Service CE1U5640en
HVAC Products 3 Applications Dec. 1, 2005
With online trend, there is a connection between plant and PC. All acquired data will
directly be stored in the PC. The graph of trend logging is made online
.
Trend logging can be printed out and exported as an ASCII file.
For more information, refer to the following chapter:
• Processes in the "Online trend" application.
3.4.2 Processes in the "Online trend" application
The following processes are described in this chapter:
• Creating / changing an online trend definition
• Selecting data points for online trend logging
• Starting online trend logging
• Evaluating online trend logging
• Printing in online trend
• External editing of online trend logging
3.4.3 Creating / changing an online trend definition
A trend definition defines the data points that shall be logged. For one trend definition,
several logging processes can be started. During logging, the data points selected in
the trend definition are logged and stored. The stored data can also be accessed after
logging has been stopped. At a later time, logging of the same trend definition and
with the same data points can again be started.
Procedure:
A. To create a new trend definition, select in the left window of the "Online trend"
application the uppermost directory (plant name). Position the onscreen pointer in
the right window of the application and press the right mouse button. A menu is
opened. Select New – Online trend definition.... Window Trend properties is
opened. The window is subdivided into several sections:
General: Enter the name of the trend definition. Additional information fields for
optional data are available. You can state the Location of the plant, the
Installer who has created the trend definition, or give an additional
Description of the trend definition.
Interval: Define the interval in seconds at which the data points to be logged shall
be stored – Interval [s].
Info: When creating the trend definition, you have not yet selected the data
points to be logged. For this reason, the relevant information is not yet
available at this point in time. After selecting the data points, you can
check here how long the Remaining logging time [h] will be until the
PC‘s storage space capacity is exhausted. The information displayed will
be updated by selecting Refresh. If you want to log for a longer period of
time, you can either extend the interval or log a smaller number of data
points.
Now, confirm your entry by clicking the OK button.
B. To copy and paste an existing trend definition, select in the left window the trend
definition you want to copy and change. Press the left mouse button, hold it down
and drag the trend definition to the uppermost directory (plant name). Then,
release the left mouse button.
Trend definition
Copy