NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
100 BU 0200 en-3118
Motor data for IE2 and IE3 motors are provided via the NORD CON software. With the aid of the
"Import motor parameter" function (also refer to the manual for the NORD CON software BU 0000
),
the required data record can be selected and imported into the frequency inverter.
Pos: 22 1 /Anlei tung en/El ektr onik/FU und Star ter/1 . Allg emei nes/Sic herh eits- und Ins tall ations hinwei se un d Warn- Gefahrenhinweise/neu/Warn- und Ge fahr enhin weise /Inf ormati on - Dop pelbel egung DIN 2 und DIN 3 [SK 2 xxE] @ 19\mod_1511860681545_388.docx @ 2373609 @ @ 1
Information
DIN 2 and DIN 3 double allocation
The digital inputs DIN2 and DIN3 are used for 2 different functions:
1. For digital functions which can be parameterised (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 if an incremental encoder is
connected, it must be ensured that the digital functions are disabled (Parameter (P420 [-02] and [-03]) or via DIP
switch (please see chapter 4.3.2.2 "DIP switches (S1)" on page 106)).
Pos: 22 2 /Anlei tung en/El ektr onik/FU und Star ter/1 . Allg emei nes/Sic herh eits- und Ins tall ations hinwei se un d Warn- Gefahrenhinweise/neu/Warn- und Gefa hre nhin weis e/I nfor mati on - V orr ang DI P - Schalt er [SK 2xxE ] @ 19\mod_1511862534906_388.docx @ 2373691 @ @ 1
Information
DIP switch priority
It must be noted that DIP switch settings at the frequency inverter (S1) have priority over the parameter settings.
The settings of the integrated potentiometers P1 and P2 must also be taken into consideration.
Pos: 223. 1 / Anlei tu ngen /El ektr oni k/F U un d St art er/ 4. I nbetr i ebn ahm e/In betr ie bna hme Betr iebs ar ten M ot orreg ler ( P300) [S K 1 x0E , SK 2xxE, SK 5x xE]/ Ausw ahl Betr ieb sar t für di e M otor reg elu ng [ SK 1 x0 E, S K 2 xxE, SK 2xx E-FDS ] @ 6 \mod_1421053542717_388.docx @ 198279 @ 2 @ 1
4.2 Selecting the operating mode for motor control
The frequency inverter is able to control motors with 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
enable the optimum results, the frequency inverter was specially designed for the control of NORD IE4
motors, whose construction corresponds to an IPMSM type (Interior Permanent Magnet Synchronous
Motor). In these motors, the permanent magnets are embedded in the rotor. The operation of other
brands must be checked by NORD as necessary. Also refer to the technical information TI 80-0010
"Planning and commissioning guidelines for NORD IE4 motors with NORD frequency inverters“.
Pos: 223. 2 / Anlei tu ngen /El ektr oni k/F U un d St art er/ 4. I nbetr i ebn ahm e/In betr ie bna hme Betr iebs ar ten M ot orreg ler ( P300) [S K 1 x0E , SK 2xx E, S K 5 xxE]/ Er läut eru ng d er B etri ebs art en ( P30 0) [SK 1x0 E, SK 2xxE, SK 5xxE, SK 2 xxE-FDS] @ 6\mod_1421056294666_388.docx @ 198310 @ 3 @ 1
4.2.1 Explanation of the operating modes (P300)
The frequency inverter provides different operating modes for the control of a motor. All operating
modes can be used with either an ASM (asynchronous motor) or a PMSM (Permanent Magnet
Synchronous Motor), however various constraints must be complied with. In principle, all these
methods are "flux oriented control methods.
Pos: 22 3.3 /A nleitu ngen/ Elektr onik /FU und St art er/4. I nbetr i ebn ahm e/In betr ie bna hme Betr iebs ar ten M ot orreg ler ( P300) [S K 1 x0E , SK 2xx E, S K 5 xxE] /Er läut eru ng d er B etri ebs art en ( P300)_01 [SK 1x0E, SK 2xxE, SK 5xxE, SK 2xxE-FDS] @ 8\mod_1441288709244_388.docx @ 239740 @ @ 1
1. VFC open-loop mode (P300, setting "0")
This operating mode is based on a voltage-governed flux oriented control method (Voltage Flux
Control Mode (VFC)). This is used for both ASMs as well as PMSMs. In association with the
operation of asynchronous motors this is often referred to as "ISD control".
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, parameterisation of the 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 frequency inverter, or if it is only possible
to determine the motor data in a comparatively imprecise manner.
Operation according to a V/f characteristic curve is only suitable for drive applications with relatively
low demands on the quality of speed control and dynamics (ramp times ≥ 1 s). For machines which
tend to have relatively large mechanical vibrations due to their construction, control according to a
V/f characteristic curve can also be advisable. Typically, V/f characteristic curves are used to
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