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.
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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-
= 7) as explained in
Table 5.5
.
Table 5.5 Accel/Decel Time Selection by Digital Input
Accel/Decel Time Sel. H1-
= 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-
= 15 (N.O. input) or H1-
= 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
NOTICE: Rapid deceleration can trigger an overvoltage fault. When faulted, the drive output shuts off, and the motor coasts. To avoid
this uncontrolled motor state and to ensure that the motor stops quickly and safely, set an appropriate Fast-stop time to C1-09.
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C2: S-Curve Characteristics
Use S-curve characteristics to smooth acceleration and deceleration and to minimize abrupt shock to the load.
5.3 C: Tuning
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
77
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Parameter Details
