relative values calculated by the metering point administration may be incorrect under certain conditions
Summary
The relative value that is computed by the metering point administration (or to be more precise by the VACO block in the zenon logic program) is reset to 0 after every archive cycle. If the absolute value changes at the exact same time when the relative value is to be reset to 0, this increase will not be recognized and therefor the calculated relative value is incorrect.
Description
The relative value that is computed by the metering point administration (or to be more precise by the VACO block in the zenon logic program) is reset to 0 after every archive cycle. If the absolute value changes at the exact same time when the relative value is to be reset to 0, this increase will not be recognized and therefor the calculated relative value is incorrect.
Solution
The described issue has been resolved. Now every value change of the absolute variable is correctly considered, even if the change happens in the exact same moment when the relative value is to be reset.
Issue Number: 36951
Fixed on Date: 30.5.2017
Versions: 7.50 0 BUILD 44965 | 7.60 0 BUILD 36068
Related Articles
Metering Point Administration does not work with variables with Special characters in their names
Summary The Metering Point Administration creates some zenon logic code to calculate the relative values. However, if either the absolute value variable or the relative value variable has special characters (like ä, ü, etc.) in its name, then the ...
relative counters created with the Metering Point Administration suddanly stopped working
Summary The Metering Point Administration allows creating relative counters which calculate the (e.g. energy) consuption within a specific time period based on the value of the linked absolute counter variable. However, the calculation of the ...
No warning when overwriting archive values with the help of the Metering Point Administration
Summary The Metering Point Administration allows to write values into an archive by entering a new manual value or by entering a meter replacement. In the latter case it would, however, not display a warning in case there already exists an entry with ...
Automatic calculation of relative values by the Metering Point Administration does not work.
Summary Even though metering points are correctly configured as automatic metering points with automatic relative value calculation, the calculation won't work. The value of the variable remains unchanged. In the windows task bar it can be seen that ...
Metering Point Administration Wizard may not start when no project is loaded
Summary If no project is added to the open workspace, or no workspace is loaded while starting the Metering Point Administration Wizard, it may happen that the wizard does not work. Description If no project is added to the open workspace, or no ...