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
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C1-01 to C1-04: Accel/Decel Times 1 and 2
Two sets of acceleration and deceleration times can be set in the drive. They can be selected by a digital input. 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 10.0 s
C1-02 Deceleration Time 1
C1-03 Acceleration Time 2
C1-04 Deceleration Time 2
Switching Acceleration Times by Digital Input
Accel/decel times 1 are active by default if no input is set. The accel/decel time 2 can be activated by a digital input (H1-
oo= 7) as explained in Table 5.5.
Table 5.5
Accel/Decel Time Selection by Digital Input
Accel/Decel Time Sel. H1-oo = 7
Active Times
Acceleration Deceleration
0 C1-01 C1-02
1 C1-03 C1-04
Figure 5.5
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)
FWD (REV)
Run command
ON
OFF
ON
ON
Accel/Decel Time Selection
(Digital Input H1-0x = “7”)
Figure 5.5 Timing Diagram of Accel/Decel Time Change
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C1-09: Fast-stop Time
Parameter C1-09 will set a special deceleration that is used when certain faults occur or that can be operated by closing a
digital input configured as H1-oo = 15 (N.O. input) or H1-oo = 17 (N.C. input). The input does not have to be closed
continuously, even a momentary closure will trigger the Fast-stop operation.
Unlike standard deceleration, once the Fast-stop operation is initiated, the drive cannot be restarted until the deceleration is
complete, the Fast-stop input is cleared, and the Run command is cycled.
A digital output programmed for “During Fast-stop” (H2-01/02/03 = 4C) will be closed as long as Fast-stop is active.
No. Parameter Name Setting Range Default
C1-09 Fast-stop Time 0.0 to 6000.0 s 10.0 s
5.3 C: Tuning
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
85
5
Parameter Details
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