YASKAWA 2A0001, Technical Manual, Page: 147 / 512

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.
u
C1: Acceleration and Deceleration Times
n 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 to
the maximum output frequency (E1-04). Deceleration time parameters always set the time to decelerate from maximum output
frequency to 0. C1-01 and C1-02 are the default active accel/decel settings.
No. 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 Accel Time 2)
<1> The setting range for the acceleration and deceleration times is determined by C1-10 (Accel/Decel Time Setting Units). 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.
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- oo = 7 and 1A) as explained in Table 5.9 .
Table 5.9 Accel/Decel Time Selection by Digital Input
Accel/Decel Time Sel. 1 H1- oo = 7 Accel/Decel Time Sel. 2 H1-
oo =
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
Figure 5.22 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).
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 S3 to S8, H1-0x = “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
Accel/Decel Time Selection 2
(Terminals S3 to S8, H1-0x = “1A”)
ON
Figure 5.22 Timing Diagram of Accel/Decel Time Change
5.3 C: Tuning
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual 147
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Parameter Details