> For the complete documentation index, see [llms.txt](https://docs.videc.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.videc.de/acron-9.3/en/faq.md).
# FAQs (Frequently Asked Questions)
## ActiveX FAQs
#### How can I back up?
ActiveX objects do not need specific backup such as you are familiar with from other programs. The properties are automatically saved.
## Graph FAQ
#### Minimize Y axis labeling in ACRON Graph
There are several ways of reducing the size of diagram Y axes in ACRON Graph:
* Minimize the font (Options/ Settings/ Font)
* Assign the diagram type by percentage (Edit/ Edit diagram/ Diagram configuration/ Diagram type/ Scaling of y-axis/ Percentage display). All the lines on the Y axis are then displayed from 0-100 %. For 10 time variation curves there is then only one Y axis.
* Display two time variation curves with only one Y axis if the Y range is equal and these process variables are positioned one behind the other. (Edit/ Edit diagram/ Diagram configuration/ Select process variable/ Axis parameters/ Scaling of Y-axis) e.g.
PV1 - range 0-100
PV2 - range 0-100
PV3 - range 30-90
PV4 - range 20-120
PV5 - range 20-120
In this case 3 Y-axes are displayed.
## ODBC FAQs
#### It is not possible to run ODBC over a network.
To nevertheless be able to access ACRON plant data on a computer in the network by ODBC, the following procedure is advisable:
1. Install ACRON and ACRON ODBC drivers.
2. Link to the remote ACRON plant via ACRON Admin/ Plants/ Plant search.
3. Configure an ODBC data source with the MS-ODBC Data Source Administrator.
## Provider FAQs
#### Historical data import via \*.csv. How are the data records in summer/winter time read in and processed?
ACRON works as follows:
Internally all data are written with UTC time and converted beforehand. The only problem arises on the changeover from summer to winter time, as the hour 2-3 is passed through twice in local time. For the double hour 2-3 on the changeover from summer to winter time the first 2-3 hour is taken as the entry.
Alternatively, the time stamp in the CSV file may also contain a marker for summer/winter time (see the relevant driver help on this).
#### iFix interface: Alert texts are not imported, "Unexpected status = 1236 The specified alert range is not configured"
The reason for this message is that the wuserq from iFix no longer delivers a correct alert text if the alert group is not equal to A-P. his is a bug in iFix and will not be fixed. Use the interface driver for iFix. It no longer runs via wuserq.exe, but via almuserq.exe.
## Reporter FAQs
#### No weekly data can be displayed in the Reporter. Message: "Database Engine called with invalid parameter"
It may be that no weekly data are being compressed.
Check the following:
Designer/ Plant configuration/ Database/ Compression levels:
The compression parameter [Week](/acron-9.3/en/anlagenverwaltung/register-datenbank.md#verdichtungsparameter) must be enabled for weekly data to be compressed.
#### The annual report based on weekly data does not show the correct year number.
This is because the first calendar week of a year begins at the end of December.
To show the correct year number in the yearly report based on weekly data, the following function can be used in a text field:
`if(report.from.monthname.short = "Dez", CStr$(val(report.from.year) +1,"%4.0f"),report.from.year)`
#### In the day data dialog a -0 is displayed for a process variable.
The entry -0 indicates that the value is not precisely 0, but to some decimal place (it may even be the 20th) is negative.
This entry can be suppressed by entering "Round(ExternalVar, 0)" under the process linkage.
#### How can I overwrite a count value for half a year with the value 0?
Overwrite a count value for half a year with the value 0 by creating a constant for the external variable in question with the ACRON Simulator.
#### Calculation variable: PV1.psum + PV2.psum is not executed
Problem:
If the values of a process variable are changed manually, the calculation of the calculation variable is no longer executed.
The calculation of a calculation variable is: VG1.psum + VG2.psum
Explanation:
Only interval values can be overwritten. In the calculation variable .psum is used.
This field is intentionally rendered invalid, however, as soon as the interval value is overwritten.
Solution:
If .ival is used instead of .psum in the calculation, the calculation is correct.
## Service FAQs
How can I back up Service data?
By backing up the `ServiceData` folder in the plant path. It contains the data for Service (e.g. C:\ProgramData\ACRON\PlantIdentification\ServiceData).
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