Specifications

6.1.4 Automatic Motor Adaptation (AMA)
AMA is an algorithm to measure the electrical motor
parameters on a motor at standstill. This means that AMA
itself does not supply any torque.
AMA is useful when commissioning systems and
optimising the adjustment of the applied motor. This
feature is particularly used where the default setting does
not apply to the connected motor.
P-04 Auto Tune allows a choice of complete AMA with
determination of all electrical motor parameters or reduced
AMA with determination of the stator resistance Rs only.
The duration of a total AMA varies from a few minutes on
small motors to more than 15 minutes on large motors.
Limitations and preconditions:
•
For the AMA to determine the motor parameters
optimally, enter the correct motor nameplate
data in P-07 Motor Power [kW] to P-08 Motor
Rotation Check.
•
For the best adjustment of the frequency
converter, carry out AMA on a cold motor.
Repeated AMA runs may heat the motor,
resulting in an increase of the stator resistance,
Rs. Normally, this is not critical.
•
AMA can only be performed if the rated motor
current is minimum 35% of the rated output
current of the frequency converter. AMA can be
carried out on up to one oversized motor.
•
It is possible to carry out a reduced AMA test
with a sine-wave filter installed. Avoid carrying
out a complete AMA with a sine-wave filter. If an
overall setting is required, remove the sine-wave
filter while running a total AMA. After completion
of the AMA, reinsert the sine-wave filter.
•
If motors are coupled in parallel, use only
reduced AMA if any.
•
Avoid running a complete AMA when using
synchronous motors. If using synchronous
motors, run a reduced AMA and manually set the
extended motor data. The AMA function does not
apply to permanent magnet (PM) motors.
•
The frequency converter does not produce motor
torque during an AMA. During an AMA, it is
imperative that the application does not force the
motor shaft to run, which is known to happen
with wind milling in ventilation systems, for
example. This disturbs the AMA function.
•
AMA cannot be activated when running a PM
motor (when P-20 Motor Construction is set to [1]
PM non-salient SPM).
6.1.5 Smart Logic Control
In applications where a PLC is generating a simple
sequence the Smart Logic Controller (SLC) can take over
elementary tasks from the main control.
SLC is designed to act from event send to or generated in
the frequency converter. The frequency converter then
performs the pre-programmed action.
6.1.6 Smart Logic Control Programming
The Smart Logic Control (SLC) is essentially a sequence of
user-defined actions (see LC-52 Logic Controller Action)
executed by the SLC when the associated user-defined
event (see LC-51 Logic Controller Event) is evaluated as
TRUE by the SLC.
Events and actions are each numbered and are linked in
pairs called states. This means that when event [1] is
fulfilled (attains the value TRUE), action [1] is executed.
After this, the conditions of event [2] is evaluated and if
evaluated TRUE, action [2] is executed and so on. Events
and actions are placed in array parameters.
Only one event is evaluated at any time. If an event is
evaluated as FALSE, nothing happens (in the SLC) during
the present scan interval and no other events are
evaluated. When the SLC starts, it evaluates event [1] (and
only event [1]) each scan interval. Only when event [1] is
evaluated TRUE, the SLC executes action [1] and starts
evaluating event [2].
It is possible to program from 0 to 20 events and actions.
When the last event/action has been executed, the
sequence starts over again from event [1]/action [1].
Illustration 6.4 shows an example with 3 events/actions:
130BA062.13
State 1
Event 1/
Action 1
State 2
Event 2/
Action 2
Start
event P13-01
State 3
Event 3/
Action 3
State 4
Event 4/
Action 4
Stop
event P13-02
Stop
event P13-02
Stop
event P13-02
Illustration 6.4 Example of Events and Actions
Application Examples VLT® HVAC Drive FC 102 Design Guide
156 MG16C102 - Rev. 2013-08-20
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