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 Function
0-** Operation/Display Parameters related to the fundamental functions of the filter, function of the LCP
buttons and configuration of the LCP display.
5-** Digital In/Out Parameter group for configuring the digital inputs and outputs.
8-** Communication and Options Parameter group for configuring communications and options.
14-** Special Functions Parameter group for configuring special functions.
15-** Unit Information Parameter group containing active filter information such as operating data,
hardware configuration and software versions.
16-** Data Readouts Parameter group for data readouts, such as current references, voltages, control,
alarm, warning and status words.
300-** AF Settings
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.
301-** AF Readouts Parameter group for the filter 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).
Programming Instruction Manual
MG37A222 Danfoss A/S © Rev. 2014-02-07 All rights reserved. 77
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