You can set four different acceleration and deceleration time pairs in the drive. When you activate and deactivate H1-xx = 7, 16, 1A [MFDI Function Select = Accel/Decel Time Selection 1, Motor 2 Selection, Accel/Decel Time Selection 2], you can switch acceleration and deceleration times during run.
Acceleration time parameters always set the time to accelerate from 0 Hz to E1-04 [Maximum Output Frequency]. Deceleration time parameters always set the time to decelerate from E1-04 to 0 Hz.
C1-01 [Acceleration Time 1] and C1-02 [Deceleration Time 1] are the default active accel/decel settings.
|
Parameter
|
Range
|
|
C1-01 [Acceleration Time 1]
|
0.0 to 6000.0 s
|
|
C1-02 [Deceleration Time 1]
|
|
C1-03 [Acceleration Time 2]
|
|
C1-04 [Deceleration Time 2]
|
|
C1-05 [Acceleration Time 3]
|
|
C1-06 [Deceleration Time 3]
|
|
C1-07 [Acceleration Time 4]
|
|
C1-08 [Deceleration Time 4]
|
Note:
The setting range for acceleration and deceleration times is 0.00 to 600.00 s when C1-10 = 0 [Accel/Decel Time Setting Units = 0.01 s (0.00 to 600.00 s)].
Use MFDIs to Switch Acceleration Times
Table 1 shows the different acceleration and deceleration times.
Table 1. Accel/Decel Times and Active Parameters
|
H1-xx = 7
[Accel/Decel Time Selection 1]
|
H1-xx = 1A
[Accel/Decel Time Selection 2]
|
Active Parameter
|
|
Acceleration Time
|
Deceleration Time
|
|
OFF
|
OFF
|
C1-01 [Acceleration Time 1]
|
C1-02 [Deceleration Time 1]
|
|
ON
|
OFF
|
C1-03 [Acceleration Time 2]
|
C1-04 [Deceleration Time 2]
|
|
OFF
|
ON
|
C1-05 [Acceleration Time 3]
|
C1-06 [Deceleration Time 3]
|
|
ON
|
ON
|
C1-07 [Acceleration Time 4]
|
C1-08 [Deceleration Time 4]
|
Figure 1shows an operation example to change acceleration and deceleration times. It is necessary to set b1-03 = 0 [Stopping Method Selection = Ramp to Stop] for this example.
Figure 1. Timing Diagram of Acceleration and Deceleration Times
Use Motor Selection to Switch Acceleration and Deceleration Times
When you set H1-xx = 16 [MFDI Function Selection = Motor 2 Selection], you can activate and deactivate the input terminal to switch between motor 1 and motor 2.
Note:
You cannot use the Motor 2 Selection function with PM motors.
Table 2 shows the possible acceleration and deceleration time combinations when you use the Motor 2 Selection function.
Table 2. Motor Selection and Acceleration and Deceleration Times
|
H1-xx = 7
[Accel/Decel Time Selection 1]
|
H1-xx = 16 [Motor 2 Selection]
|
|
Motor 2 Selection: OFF
|
Motor 2 Selection: ON
|
|
Acceleration Time
|
Deceleration Time
|
Acceleration Time
|
Deceleration Time
|
|
OFF
|
C1-01
|
C1-02
|
C1-05
|
C1-06
|
|
ON
|
C1-03
|
C1-04
|
C1-07
|
C1-08
|
Use Output Frequency Level to Switch Acceleration and Deceleration Times
The drive can use output frequency to automatically switch between different acceleration and deceleration times. When the output frequency = C1-11 [Accel/Decel Time Switchover Freq], the drive automatically switches the acceleration and deceleration times. Set C1-11 = 0.0 Hz to disable this function.
Note:
-
Acceleration and deceleration times set to MFDIs are more important than the automatic switch using the frequency level set in C1-11. For example, if you set the switchover frequency to C1-11, the drive will not automatically switch acceleration and deceleration times when the MFDI terminal set for Accel/Decel Time Selection 1 [H1-xx = 7] is activated.
-
If Motor 2 Selection [H1-xx = 16] is activated, the drive will set the acceleration/deceleration time to C1-05 and C1-06 for motor 2 when the output frequency is more than the frequency level set in C1-11.
Figure 2. Accel/Decel Time Switching Frequency
