6 System start-up
BU 0750 GB Technical design subject to change 75
6 System start-up
General
When power is fed to the inverter it will be ready for operation within moments. In this condition the inverter
can be adjusted to the requirements of the application, in other words the parameters of the control process
can be defined. A complete and detailed description of each parameter available is provided in the paragraphs
below.
Before the motor is allowed to be started by means of an enable signal, the necessary parameters must have
been set by personnel properly qualified for this task.
CAUTION: As no master power switch is provided on the inverter, the device is always live while connected
to mains voltage.
6.1 Basic settings
All frequency inverters supplied by NORD are programmed in advance in the factory for standard uses involv-
ing 4-pole standard NORD-produced motors. If other motors are used, the technical data mentioned on the
type plate of these motors must be entered into the parameters belonging to the >Motor data< menu item.
Recommendation: For the drive to work smoothly the motor data made available to the inverter should
be as accurate as possible (as indicated on the type plate). It is very important, too, that an
automatic stator resistance measurement be executed by the inverter (P208).
Note: The motor shown above as an example would have to be star-connected.
In the factory the inverter is programmed in advance for standard uses involving 4-pole three-phase standard
motors. The parameterisation for NORD motors which do not belong to this category can be accomplished just
as conveniently by selecting the type in question from a list which is stored in the device under the parameter
number P200. The data are then loaded into the parameters P201 to P208 automatically where they can be
viewed to be compared once again with the actual data on the motor's rating plate. Subsequently P200 will
show 0 (zero) again or no change! respectively.
For any motor which is not mentioned in the list, the data on its rating plate must be entered into the parame-
ters P201 to P208 manually.
For the stator resistance to be determined automatically, P208 must be set = 0 and the ENTER key pressed
afterwards for input acknowledgement. The system will convert the measured value to the phase resistance
(which depends on the type of connection according to P207) and store the result obtained.
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