Siemens LMV5 Quick Start Manual page 219

Saving and Viewing Trends 9-6
The ACS450 can also be used to view and save trends. Trending enables the technician to
easily view and quantify system behavior over time. This feature is particularly useful for
setting up PID loops since "hunting" can be easily recognized on a trend. The following
steps outline the procedure for viewing and saving trends with the ACS450.
1) Connect to the AZL5 at any access level. See installation and set-up 9-2 if necessary.
After the connection is established, go to the System LMV5x dropdown menu and select
Record Trending. A window will appear, asking where the trending flies are to be saved.
Type a appropriate name in front of the .tbd extension. Thus a valid name would look
like : siemens.tdb Notice that the * is no longer in the name.
2) After the name is typed in, click on Open. Also click on Yes when the window appears
asking if you would like to create the file. The trending screen should now appear.
3) The trending screen will trend all the variables that are checked on the right hand side of
the screen. These can be turned off and on by clicking on the check. The variables can
be identified and pen colors changed by clicking in the box to the right of each variable.
4) The title and measurement interval for the trend can be changed in the measurement
box. Triggers can also be set to start the trending automatically.
5) After the trending screen is set-up, trends can be recorded. To start recording a trend
manually, click on Start. The state window should indicate that the measurement has
started.
6) Trends will be buffered until Stop is clicked. When Stop is clicked, the trends will be
saved under the previously defined .tbd file.
7) Trends can be viewed when the ACS450 is disconnected from the AZL5. To view trends,
go to the File dropdown menu and select Show Trending. A window will appear
prompting for the correct .tbd file. Select the .tbd file that contains the trends to be
viewed and / or exported.
8) Select the trend to be viewed or exported. If Ok is clicked then the trend can be seen in
ACS450. If Export is clicked, a .csv file can be created that can be opened with MS
Excel.
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