Delta VFD040C43A-21 - Page 501

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-01-8

01-23
Switch Frequency between the First and Fourth Accel./Decel.
Default: 0.00
Settings 0.00–599.00 Hz
 This function does not require the external terminal switching function; it switches the
acceleration and deceleration time automatically according to the Pr.01-23 setting. If you set the
external terminal, the external terminal has priority over Pr.01-23.
 Use this parameter to set the switch frequency between acceleration and deceleration slope. The
First / Fourth Accel. / Decel. slope is calculated by the Max. Operation Frequency (Pr.01-00) /
acceleration / deceleration time.
Example: When the Max. Operation Frequency (Pr.01-00) = 80 Hz, and Switch Frequency
between First and Fourth Accel. / Decel. (Pr.01-23) = 40 Hz:
a. If Acceleration Time 1 (Pr.01-02) = 10 sec., Acceleration Time 4 (Pr.01-18) = 6 sec., then the
acceleration time is 3 sec. for 0–40 Hz and 5 sec. for 40–80 Hz.
b. If Deceleration Time 1 (Pr.01-13) = 8 sec., Deceleration Time 4 (Pr.01-19) = 2 sec., then the
deceleration time is 4 sec. for 80–40 Hz and 1 sec. for 40–0 Hz.

01-24
S-Curve for Acceleration Begin Time 1

01-25
S-Curve for Acceleration Arrival Time 2

01-26
S-Curve for Deceleration Begin Time 1

01-27
S-Curve for Deceleration Arrival Time 2
Default: 0.20
Settings Pr.01-45 = 0: 0.00–25.00 sec.
Pr.01-45 = 1: 0.0–250.0 sec.
 Using an S-curve gives the smoothest transition between speed changes. The acceleration and
deceleration curve adjusts the acceleration and deceleration S-curve. When enabled, the drive
produces a different acceleration and deceleration curve according to the acceleration and
deceleration time.
 The S-curve function is invalid when you set the acceleration and deceleration time to 0.
 When Pr.01-12, Pr.01-14, Pr.01-16, Pr.01-18  Pr.01-24 and Pr.01-25,
the actual acceleration time = Pr.01-12, Pr.01-14, Pr.01-16, Pr.01-18 + (Pr.01-24 + Pr.01-25) / 2.
 When Pr.01-13, Pr.01-15, Pr.01-17, Pr.01-19  Pr.01-26 and Pr.01-27,
the actual deceleration time = Pr.01-13, Pr.01-15, Pr.01-17, Pr.01-19 + (Pr.01-26 + Pr.01-27) / 2