TDE MACNO MINIOPD EXP User Manual page 46

Points P176 and P178 define the frequency percentage with reference to the maximum working
frequency while points P175 and P177 define the percentage voltage with reference to the maximum
working voltage (P64).
The following curve should clarify the explanation.
"TYPICAL CURVE WITH QUADRATIC TORQUE LOAD"
If a number of points which is less than two is sufficient to define the curve just program at 0 the
frequencies of the points which are not used (P176 and/or P178), so that they will not be considered
in the interpolation.
There are some limitations on setting the characteristic:
- Frequencies (P176 and P178) must be in rising order and the distance between two
adjacent points must be greater than 5%
- Corresponding voltages (P175 and P177) must be in rising order.
If this limitations are not respected the system doesn't take in account the point whose component
was set wrongly and it is cleared to 0. Every time one of this parameters (from P175 to P178) is
changed, it is better to verify if the system has accepted the new value.
A linear type Voltage-Frequency characteristic is provided for the default for which
P175=P176=P177=P178=0.
STANDARD CURVE FOR A MOTOR WORKING IN CONSTANT TORQUE IN ALL ITS
CHARACTERISTICS
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