How To Programme The Active Filter; Using The Low Harmonic Drive In Npn Mode - Danfoss VLT AQUA Operating Instructions Manual

VLT AQUA Low Harmonic Drive Operating In-
structions

6.2 How to Programme the Active Filter

The factory settings for the filter part of the Low Harmonic Drive are chosen for optimal operation with a minimum of additional programming. All CT-
values, as well as frequency, voltage levels and other values directly linked to the drive configuration are pre-set.
It is not recommended to change any other parameters influencing the filter operation. However, selection of read-outs and what information to be
displayed on the LCP status lines can be made to fit individual preferences.
To set up the filter two steps are necessary:
• Change the nominal voltage in par. 300-10
• Make sure the filter is in auto mode (press the Auto On button on the LCP)
Overview of parameter groups for the filter part
Group Title
0- Operation / Display
5- Digital In/Out
8- Communication and Options
14- Special Functions
15- Unit Information
16- Data Readouts
300- AF Settings
301- AF Readouts
Table 6.4: Parameter groups
A list of all parameters accessible from the filter LCP can be found in the section
parameters can be found in the VLT Active Filter AAF005 Manual,

6.2.1 Using the Low Harmonic Drive in NPN Mode

Digital I/O Mode is PNP mode. If NPN mode is desired, it is necessary to change the wiring in the filter part of the Low
The default setting for par. 5-00,
Harmonic Drive. Before changing the setting in par. 5-00 to NPN mode, the wire connected to 24V (control terminal 12 or 13) must be changed to terminal
20 (ground).
Function
Parameters related to the fundamental functions of the filter, function of the LCP buttons
and configuration of the LCP display.
Parameter group for configuring the digital inputs and outputs.
Parameter group for configuring communications and options.
Parameter group for configuring special functions.
Parameter group containing active filter information such as operating data, hardware
configuration and software versions.
Parameter group for data read-outs, e.g. actual references, voltages, control, alarm,
warning and status words.
Parameter group for setting the Active Filter. Apart from par. 300-10,
Voltage , it is not recommended to change the settings of this parameter group
Parameter group for the filter readouts.
Parameter Options - Filter . A more detailed description of the active filter
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MG.20.T1.02 - VLT is a registered Danfoss trademark
6 How to Programme the Low Harmonic Drive
6
Active Filter Nominal
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