12.4 C: Tuning
770 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Figure 12.44 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 12.30 shows the possible acceleration and deceleration time combinations when you use the Motor 2 Selection
function.
Table 12.30 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 12.45 Accel/Decel Time Switching Frequency
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