Functions and Technical Specifications
4-12
EM 148-FC
Frequency Converter
A5E00065321-03
Ramp-up time
This parameter controls the acceleration of the motor. The motor accelerates from
the minimum to the maximum parameterized motor frequency in the time specified.
Note
If the ramp-up time set is too short, this can result in the converter switching off
due to excess current.
Example of parameterization via the DDB File:
Desired ramp-up time = 30 s
Time factor = 1 s
Max. possible ramp-up time = 510 s
Max. parameter value = 255
Parameter value = ramp-up time *
Max. parameter value
Max. ramp-up time * time factor
Parameter value = 30 s *
255
510 s * 1
= 15
This formula only applies when f
max
= f
setpoint
Ramp-down time
This parameter controls the deceleration of the motor. The motor brakes from the
maximum to the minimum parameterized motor frequency in the time specified.
Note
If the ramp-down time set is too short, this can result in the converter switching off
due to overvoltage.
Содержание SIMATIC EM 148-FC
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Страница 66: ...Mode of Functioning 5 10 EM 148 FC Frequency Converter A5E00065321 03 ...
Страница 70: ...Dimensioned Drawing B 2 EM 148 FC Frequency Converter A5E00065321 03 ...
Страница 76: ...4 Product Information on Manual EM 148 FC Frequency Converter Edition 04 2003 A5E00476687 03 ...