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-
= 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-
= 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
Figure 5.23
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 5.23 Timing Diagram of Accel/Decel Time Change
Switching Accel/decel Times by a Frequency Level
The drive can automatically switch from accel/decel times 4 (C1-07 and C1-08) to the default accel/decel times (C1-01/02
for motor 1, C1-05/06 for motor 2) when the output frequency exceeds the frequency level set in parameter C1-11. When
it falls below this level, the accel/decel times are switched back.
Figure 5.24
shows an operation example.
Note:
Acceleration and deceleration times selected by digital inputs have priority over the automatic switching by a frequency level. For example,
if accel/decel time 2 is selected, the drive will use this time only and not switch from accel/decel time 4 to the selected one.
5.3 C: Tuning
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
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Parameter Details
7/16/2008-13:23