SAMI G S 9.2 Main 20 - Drive 9.2.1 Group 21 - Acceler/Deceler These values can be altered with the SAMI GS running. S1-SHAPE Suitable for ramp times less than one sec- ond. S2-SHAPE Suitable for ramp times less than 1.5 seconds. S3-SHAPE Suitable for ramp times up to 15 seconds. 2 Acceler Time 1, 3 Deceler Time 1 4 Acceler Time 2, 5 Deceler Time 2 Figure 9-5. Acceleration/deceleration ramp shapes: Linear, S1, S2 and S3. These times correspond to the time required for the output frequency to change from MINIMUM to MAXIMUM FREQUENCY and vice versa.
Regardless of the settings, the maximum theoretical acceleration/decelera- tion is 120Hz/0.1s (max slope = 1200Hz/s) and the minimum 120 Hz/1800s (min slope = 0.067 Hz/s). The time required for the accel- eration from zero to minimum frequency depends on the ACCELER TIME (accelera- tion = f max - f min /acceleration time). 1 Acc/Dec Ramp Shape This parameter allows you to select the shape of the acceleration/deceleration ramp. The available options are (refer to Figure 9-5): LINEAR Suitable for drives requiring steady accel- eration/deceleration and/or slow ramps.
48 Parameter Range/Unit Description 1 Acc/Dec Ramp Shape Li 2 Acceler Time 1 3 Deceler Time 1 4 Acceler Time 2 5 Deceler Time 2 6 Acceler Ref2 Time 7 Deceler Ref2 Time near/S1...S3 Shape 0.1...1800 s 0.1...1800 s 0.1...1800 s 0.1...1800 s 0.1...1800 s 0.1...1800 s Accel./Decel. ramp shape selection Time for f - f acceleration ramp 1 min max Time for f - f deceleration ramp 1 max min Time for f - f acceleration ramp 2 min max Time for f - f deceleration ramp 2 max min Ref2 acceleration ramp time for 0 - 100 % Ref2 deceleration ramp time for 100 - 0 % ff o uu tt o [Hz] 50 Linear S1 S2 S3 1 1,25 2t t [s Linear S1 S2 S3 Linear S2 S3