11.4 C: Tuning
750 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Figure 11.45 Timing Diagram of Acceleration and Deceleration Times
■ Use Motor Selection to Switch Acceleration and Deceleration Times
When you set H1-xx = 16 [MFDI Function Select = 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 11.35 shows the possible acceleration and deceleration time combinations when you use the Motor 2
Selection function.
Table 11.35 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.
The acceleration and deceleration times for the drive are switched automatically. 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 the MFDI set for Accel/Decel Time Selection 1 [H1-xx = 7] is activated, the drive will use only accel/decel time 2 (or
accel/decel time 4 for motor 2). If you use a frequency level set in C1-11, the drive will not automatically switch acceleration and
deceleration times.
• 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 11.46 Accel/Decel Time Switchover Freq
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