YASKAWA Varispeed L7 - Page 147

5-18
Switching Acceleration and Deceleration Time Using Multi-Function Input Terminal
Commands
When two digital input terminals are set for “Accel./Decel. time switch over 1 and 2” (H1-=7 and 1A), the
acceleration/deceleration times can be switched over even during operation by combining the ON/OFF status
of the terminals.
The following table shows the acceleration/deceleration time switching combinations.
Automatic Deceleration Time Switch Over Using a Speed Level
The deceleration times can be switched over automatically at a certain speed which can be set in parameter
C1-11, when S1-26 is set 0.0 Hz.
Fig 5.5 shows the working principle of the function.
Set C1-11 to a value other than 0.0 Hz. If C1-11 is set to 0.0 Hz, the function will be disabled.
Fig 5.5 Acceleration/deceleration Time Switching Frequency
Acceleration/Deceleration
Time Selection 1 Terminal
Acceleration/Deceleration
Time Selection 2 Terminal
Acceleration Time Deceleration Time
OFF OFF C1-01 C1-02
ON OFF C1-03 C1-04
OFF ON C1-05 C1-06
ON ON C1-07 C1-08
Output
Frequency
Accel./Decel. time
Switching Freq.
C1-11
C1-01
C1-02 C1-08
When output frequency ≥ C1-11, deceleration are performed using deceleration Time 1 (C1-02).
When output frequency < C1-11, deceleration are performed using deceleration Time 4 (C1-08).
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