12.4 C: Tuning
550 YASKAWA SIEPC71061753C GA500 Technical Manual
When the output frequency is at the C1-11 value, the drive automatically switches the acceleration and
deceleration times. Set this parameter to 0.0 to disable this function.
Figure 12.37 Accel/Decel Time Switchover Freq
Table 12.36 lists the possible combinations of acceleration and deceleration time switchover frequencies and the
acceleration times for the Motor 2 Selection function.
Table 12.36 Motor and Acceleration and Deceleration Time Combination
C1-11
Motor 1 Motor 2
Acceleration Time Deceleration Time Acceleration Time Deceleration Time
Less than the setting value C1-07 [Acceleration Time 4] C1-08 [Deceleration Time 4] C1-07 [Acceleration Time 4] C1-08 [Deceleration Time 4]
Equal to or more than the setting
value
C1-01 [Acceleration Time 1] C1-02 [Deceleration Time 1] C1-05 [Acceleration Time 3] C1-06 [Deceleration Time 3]
■ C1-14: Accel/Decel Rate Frequency
No.
(Hex.)
Name Description
Default
(Range)
C1-14
(0264)
RUN
Accel/Decel Rate
Frequency
Sets the base frequency used to calculate acceleration and deceleration rates.
0.0 Hz
(0.0 - 590.0 Hz)
The acceleration and deceleration rates set in C1-01 to C1-09 [Acceleration/Deceleration Times 1 to 4, Fast Stop
Time] will change when the value of C1-14 changes.
• When C1-14 = 0.0 Hz
– C1-01, C1-03, C1-05, C1-07 [Acceleration Times 1 to 4]: Time to accelerate from 0 Hz to E1-04 [Maximum
Output Frequency]
– C1-02, C1-04, C1-06, C1-08 [Deceleration Times 1 to 4], C1-09 [Fast Stop Time]: Time to decelerate from
E1-04 to 0 Hz.
Figure 12.38 Example 1: Acceleration/Deceleration Rate (When C1-14 = 0 Hz, E1-04 = 60 Hz, and the Frequency
Reference is 60 Hz)
• When C1-14 ≠ 0.0 Hz
– C1-01, C1-03, C1-05, C1-07: Time to accelerate from 0 Hz to C1-14
– C1-02, C1-04, C1-06, C1-08, C1-09: Time to decelerate from C1-14 to 0 Hz
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