C: Tuning - YASKAWA L1000A Technical Manual

5.3 C: Tuning

5.3 C: Tuning
C parameters set the characteristics for acceleration, deceleration, and Jerk. Other parameters in the C group cover
settings for slip compensation, torque compensation, and carrier frequency.
◆ C1: Acceleration and Deceleration Ramps
■
C1-01 to C1-08: Accel, Decel Ramps 1 to 4
Four different sets of acceleration and deceleration times can be set in the drive by digital inputs, motor selection, or
switched automatically. Acceleration ramp parameters always set the ramp or time to accelerate from 0 to the maximum
speed. Deceleration ramp parameters always set the ramp or time to decelerate from the maximum speed to 0. C1-01 and
C1-02 are the default active accel/decel settings.
No.
C1-01
C1-02
C1-03
C1-04
C1-05
C1-06
C1-07
C1-08
<1> The setting range and default value depend on the display units set in parameter o1-03. If o1-03 is set between 0 and 4, the time required to go
from 0% speed to 100% maximum speed is expressed in seconds. If o1-03 is set to 5 or 6, then setting units will appear in m/s
drive is in V/f control mode the accel/decel ramps can be set in seconds only.
Switching Acceleration Ramps by Digital Input
Accel/decel ramps 1 are active by default if no input is set. The accel/decel ramps 2, 3, and 4 can be activated by digital
inputs (H1- = 7 and 1A) as explained in
Accel/Decel Ramp Sel. 1
H1- = 7
0
1
0
1
Figure 5.5 shows an operation example for changing accel/decel ramps. The example below requires that the stopping
method be set for "Ramp to stop" (b1-03 = 0).
Figure 5.5
Output
speed
Up/Down
command
Accel/Decel Ramp Selection 1
(Terminals S3 to S8, H1- = "7")
Accel/Decel Ramp Selection 2
(Terminals S3 to S8, H1- = "1A")
154
Parameter Name
Acceleration Ramp 1
Deceleration Ramp 1
Acceleration Ramp 2
Deceleration Ramp 2
Acceleration Ramp 3(Motor 2 Accel Time 1)
Deceleration Ramp 3(Motor 2 Decel Time 1)
Acceleration Ramp 4(Motor 2 Accel Time 2)
Deceleration Ramp 4(Motor 2 Decel Time 2)
Table 5.6.
Table 5.6 Accel/Decel Ramp Selection by Digital Input
Accel/Decel Ramp Sel. 2
H1- = 1A
0
0
1
1
Decel Ramp 1
Decel Ramp 2
(C1-02)
(C1-04)
Accel Ramp 1
Accel Ramp 2
(C1-01)
(C1-03)
ON OFF ON
ON
Figure 5.5 Timing Diagram of Accel/Decel Ramp Change
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Acceleration
C1-01
C1-03
C1-05
C1-07
Decel Ramp 3
Accel Ramp 3
(C1-06)
(C1-05)
Accel Ramp 4
(C1-07)
Decel Ramp 1
(C1-02)
OFF
ON
ON
OFF ON
ON
Setting Range
0.00 to 600.00 s
<1>
2
Active Ramps
Deceleration
C1-02
C1-04
C1-06
C1-08
Decel Ramp 4
(C1-08)
Decel Ramp 1
(C1-02)
common_TMonly
Time
Default
1.50 s
<1>
2
or ft/s . If the