4 Commissioning
BU 0200 en-US-4920
101
For the correct operation of the drive unit, it is necessary to input the motor data from the nameplate
as precisely as possible. In particular, an automatic stator resistance measurement using parameter
P220
is recommended.
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Motor data for IE2 / IE3 motors are provided via the
NORDCON
software. The required data record
can be selected and imported into the variable frequency drive with the aid of the "Import motor
parameter" function (also refer to the manual for the
NORDCON
software
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Information
DIN 2 and DIN 3 double allocation
Digital inputs DIN2 and DIN3 are used for 2 different functions:
1. for digital functions that can be parameterized (e.g. “enable left”),
2. for evaluation of an incremental encoder.
Both functions are coupled by an OR link.
Evaluation of an incremental encoder is always activated. This means that when an incremental encoder is
connected, make sure that the digital functions are switched off (parameter (P420 [-02] and [-03]) or with DIP
switch (please see chapter 4.3.2.2 "DIP switches (S1)" on page 107)).
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Information
DIP switch priority
Please note that DIP switch settings on the variable frequency drive (
S1
) have priority over parameter settings.
The settings of integrated potentiometers
P1
and
P2
must also be taken into consideration.
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4.2 Selecting the operating mode for motor control
The variable frequency drive is able to control motors of all efficiency classes (IE1 to IE4). Motors
which we manufacture are produced as asynchronous motors in efficiency classes IE1 to IE3,
whereas IE4 motors are produced as synchronous motors.
Operation of IE4 motors has many special features with regard to the control technology. In order to
achieve optimum results, the variable frequency drive was specially designed to control NORD IE4
motors whose construction corresponds to an IPMSM type (interior permanent-magnet synchronous
motor). The permanent magnets in these motors are embedded in the rotor. NORD must check the
operation of other brands if necessary. Please refer as well to Technical Information
"Planning and commissioning guidelines for NORD IE4 motors with NORD variable frequency drives".
Pos : 228. 2 / Anleit ungen/El ektr onik /FU und St art er/4. I nbetri ebnahm e/ Inbetriebnahme Betriebs arten M ot orregler ( P300) [SK 1x 0E, SK 2xx E, SK 5xxE]/ Erläut erung der Betri ebs art en (P300) [ SK 1x0E, SK 2xxE, SK 5xx E, SK 2xx E-FDS] @ 6\m od_1421056294666_14638.docx @ 198311 @ 3 @ 1
4.2.1 Explanation of the operating modes (P300)
The variable frequency drive provides various operating modes to control a motor. All operating
modes can be used with either an ASM (asynchronous motor) or a PMSM (permanent-magnet
synchronous motor) but various constraints must be complied with. Basically, all methods are field-
oriented control methods.
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1 VFC open-loop mode (P300, setting 0)
This operating mode is based on a voltage-governed, field-oriented control method (Voltage Flux
Control Mode (
VFC
)). This is used for both ASMs as well as PMSMs. This is often referred to as
"ISD control" in connection with the operation of asynchronous motors.
Control is carried out without the use of encoders and exclusively on the basis of fixed parameters
and the measurement results of actual electrical values. No specific control parameter settings are
necessary for the use of this mode. However, parameterization of precise motor data is an
essential prerequisite for efficient operation.
As a special feature for the operation of an ASM, there is also the possibility of control according to
a simple V/f characteristic curve. This mode of operation is important if several motors which are
not mechanically coupled are to be operated with a single variable frequency drive, or if it is only
possible to determine the motor data in a comparatively imprecise manner.
