C: Tuning - YASKAWA U1000 Series Technical Manual

5.3 C: Tuning

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.
No.
C1-01
C1-02
C1-03
C1-04
C1-05
C1-06
C1-07
C1-08
<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.
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
Accel/Decel Time Sel. 1
H1- = 7
0
1
0
1
Figure 5.32 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 5.32
Output
frequency
FWD (REV)
Run command
Accel/Decel Time Selection 1
(Terminals S1 to S8, H1-
Accel/Decel Time Selection 2
(Terminals S1 to S8, H1-
178
Parameter Name
Acceleration Time 1
Deceleration Time 1
Acceleration Time 2
Deceleration Time 2
Acceleration Time 3 (Motor 2 Accel Time 1)
Deceleration Time 3 (Motor 2 Decel Time 1)
Acceleration Time 4 (Motor 2 Accel Time 2)
Deceleration Time 4 (Motor 2 Decel Time 2)
Table 5.13.
Table 5.13 Accel/Decel Time Selection by Digital Input
Accel/Decel Time Sel. 2
H1- = 1A
0
0
1
1
Decel Time 1
(C1-02)
Accel Time 1
Accel Time 2
(C1-01)
(C1-03)
ON OFF ON
ON
= "7")
= "1A")
Figure 5.32 Timing Diagram of Accel/Decel Time Change
Acceleration
C1-01
C1-03
C1-05
C1-07
Decel Time 3
Decel Time 2
Accel Time 3
(C1-06)
(C1-04)
(C1-05)
Accel Time 4
(C1-07)
Decel Time 1
(C1-02)
OFF
ON
OFF
ON
YASKAWA ELECTRIC SIEP C710636 03A YASKAWA U1000 Technical Manual
Setting Range
0.0 to 6000.0 s
<1>
Active Times
Deceleration
C1-02
C1-04
C1-06
C1-08
Decel Time 4
(C1-08)
Decel Time 1
(C1-02)
Time
ON
ON
Default
10.0 s