How To Program The Active Filter; Using The Low Harmonic Drive In Npn Mode - Danfoss VLT AutomationDrive FC 302 Instruction Manual

Programming

6.2 How to Program the Active Filter

The factory settings for the filter part of the Low Harmonic Drive are selected 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 adjustable
frequency drive configuration are pre-set.
Do not change any other parameters influencing the filter operation. However, selection of readouts and information
displayed on the LCP status lines can be customized.
To set up the filter, two steps are necessary:
1. Change the nominal voltage in 300-10 Active Filter Nominal Voltage
2. Make sure the filter is in auto mode (press [Auto On])
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 6.10 Parameter Groups
A list of all parameters accessible from the filter LCP can be found in the section Parameter Options - Filter. A more detailed
description of the active filter parameters can be found in chapter 6.4 Parameter Lists - Active Filter.

6.2.1 Using the Low Harmonic Drive in NPN Mode

The default setting for parameter 5-00 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 Harmonic Drive. Before changing the setting in parameter 5-00 Digital I/O Mode to NPN
mode, the wire connected to 24 V (control terminal 12 or 13) must be changed to terminal 20 (ground).
MG37A222
Instruction Manual
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 readouts, such as current references, voltages, control,
alarm, warning and status words.
Parameter group for setting the active filter. Apart from par. 300-10, Active Filter
Nominal Voltage, it is not recommended to change the settings of this parameter
group.
Parameter group for the filter readouts.
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
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