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6. APPLICATION FUNCTIONS
The S-curve ratio indicates which part of the Sin-curve is used to draw the acceleration/deceleration curve as
shown in the figure below.
A
B
B/2 B/2
Sin-curve
Speed
V
When S-curve ratio is 70%
t
Speed
V
When S-curve ratio is 100%
t
b/a = 0.7
b
a
(Example)
S-curve ratio = B/A 100%
POINT
The valid limits of S-curve ratio are 30 to 100%. When less than 30% is set,
the command waveform is the same as the one of the setting of 0%.
The setting at starting operation is valid for the S-curve ratio. If the S-curve
ratio is changed during operation, the change is not made. It is validated
(changed) the next time operation is started.
When the change speed is performed, the acceleration/deceleration based on the Sin-curve to the set speed is
performed again from the time of the completion of preparation for changing speed.
Speed
Acceleration time constant Deceleration time constant
Speed limit value
Command speed 1
Sin-curve
Command speed 2
Command speed 3
Change speed
(SCHG)
(SCF)
Acceleration time constant
Command
speed 2
Command speed 1 Command speed 3 Command speed 1
Completion of speed
change preparation
ON
OFF
ON
OFF