
Chapter 4 -SETTING-UP AND COMMISSIONING
584S Frequency Inverter
4-11
NOTE: When using PARABOLIC RAMP or S RAMP, the time taken for the motor speed to reach
the speed setpoint will be dependent on the ramp time, the size of the speed setpoint and the value of
the
S RAMP %
parameter. Refer to the following sub-paragraphs for further details regarding
PARABOLIC RAMP or S RAMP characteristics.
PARABOLIC RAMP:
PARABOLIC RAMP:
PARABOLIC RAMP:
PARABOLIC RAMP:
RAMP OUTPUT
TIME
Tr
d%
The PARABOLIC RAMP response time for a given setpoint step size, d%, and
S RAMP %
can be calculated as
follows:
If
2
100
200
200
×
×
−
≤
−
d
SRAMP
SRAMP
SRAMP
SRAMP
%
%
%
%
%
%
%
%
Then the PARABOLIC RAMP contains pure acceleration only. Thus, the response time, Tr, can be calculated
using:
Tr
RAMPTIME
d
SRAMP
SRAMP
=
×
×
×
−
2
100
200
%
%
%
%
%
Else, the PARABOLIC RAMP contains acceleration and linear sections to its response. Thus, the response time, Tr,
can be calculated using:
Tr
RAMPTIME
d%
100%
1
2
SRAMP%
200% SRAMP%
=
×
+ ×
−
NOTE:-
100% is assumed to be equal to the
LIMIT FREQUENCY.
The S applies to the start of the acceleration and the start of the deceleration
This manual was downloaded on www.sdsdrives.com
+44 (0)117 938 1800 - [email protected]
Summary of Contents for 584S
Page 122: ...This manual was downloaded on www sdsdrives com 44 0 117 938 1800 info sdsdrives com ...
Page 173: ...This manual was downloaded on www sdsdrives com 44 0 117 938 1800 info sdsdrives com ...
Page 174: ...This manual was downloaded on www sdsdrives com 44 0 117 938 1800 info sdsdrives com ...
Page 175: ...This manual was downloaded on www sdsdrives com 44 0 117 938 1800 info sdsdrives com ...