Rockwell-automation 20B PowerFlex 70, PowerFlex 700 Reference Manual Manual do Utilizador descarregar pdf (Página 152)

S Curve

152 Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013

S-Curve Selection

S-curve is enabled by defining the time to extend the acceleration and

deceleration. The time is entered as a percentage of acceleration and deceleration

time. In this case acceleration time is 2.0 seconds. The line on the left has s-curve

set to 0%. The other lines show 25%, 50%, and 100% S-curve. At 25% S-curve

acceleration time is extended by 0.5 seconds (2.0 * 25%). Note that the linear

portion of this line has the same slope as when s-curve is set to zero.

The acceleration and deceleration times are independent but the same S-curve

percentage is applied to both of them. With S-curve set to 50%, acceleration time

is extended by 0.5 seconds (1.0 * 50%), and deceleration time is extended by 1.0

seconds (2.0 * 50%).

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

Seconds

-80.0

-60.0

-40.0

-20.0

0.0

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40.0

60.0

80.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Seconds

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

Seconds

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

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