5.3 C: Tuning
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 183
5.3 C: Tuning
C parameters are used to set the acceleration and deceleration characteristics, as well as S-curves. Other parameters in
this group cover settings for slip compensation, torque compensation, and carrier frequency.
C1: Acceleration and Deceleration Times
C1-01 to C1-08: Accel, Decel Times 1 to 4
Four different sets of acceleration and deceleration times can be set in the drive. They can be selected by digital inputs,
by the motor selection, or can be switched automatically. Acceleration time parameters always set the time to accelerate
from 0 Hz to the maximum output frequency (E1-04). Deceleration time parameters always set the time to decelerate
from maximum output frequency to 0 Hz. C1-01 and C1-02 are the default active accel/decel settings.
Switching Acceleration Times by Digital Input
Accel/decel times 1 are active by default if no input is set. The accel/decel times 2, 3, and 4 can be activated by digital
inputs (H1- = 7 and 1A) as explained in Table 5.13.
Table 5.13 Accel/Decel Time Selection by Digital Input
Figure 5.33 shows an operation example for changing accel/decel. times. The example below requires that the stopping
method be set for “Ramp to stop” (b1-03 = 0).
Figure 5.33
Figure 5.33 Timing Diagram of Accel/Decel Time Change
No.
<1> The setting range for the acceleration and deceleration times is determined by the accel/decel time setting units in C1-10. For example, if the
time is set in units of 0.01 s (C1-10 = 0), the setting range becomes 0.00 to 600.00 s.
Parameter Name Setting Range Default
C1-01
Acceleration Time 1
0.0 to 6000.0 s
<1> 10.0 s
C1-02
Deceleration Time 1
C1-03 Acceleration Time 2
C1-04 Deceleration Time 2
C1-05 Acceleration Time 3 (Motor 2 Accel Time 1)
C1-06 Deceleration Time 3 (Motor 2 Decel Time 1)
C1-07 Acceleration Time 4 (Motor 2 Accel Time 2)
C1-08 Deceleration Time 4 (Motor 2 Decel Time 2)
Accel/Decel Time Sel. 1
H1- = 7
Accel/Decel Time Sel. 2
H1- = 1A
Active Times
Acceleration Deceleration
0 0 C1-01 C1-02
1 0 C1-03 C1-04
0 1 C1-05 C1-06
1 1 C1-07 C1-08
Output
frequency
Accel Time 1
(C1-01)
Decel Time 1
(C1-02)
Accel Time 2
(C1-03)
Decel Time 2
(C1-04)
Decel Time 1
(C1-02)
Time
FWD (REV)
Run command
ON
OFF
ON
ON
Accel/Decel Time Selection 1
(Terminals S1 to S8, H1- = “7”)
Accel Time 3
(C1-05)
Decel Time 3
(C1-06)
Accel Time 4
(C1-07)
Decel Time 4
(C1-08)
Decel Time 1
(C1-02)
ON
OFF
ON
OFF
ON
ccel/Decel Time Selection 2
(Terminals S1 to S8, H1- = “1A”)
ON
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