YASKAWA iQpump Micro CIMR-PW Series User Manual page 142

5.3 C: Tuning
• Accel Times 1 through 4 determine the time required to accelerate from 0 to the value set in C1-14 (Accel/Decel Rate
Frequency)
• Decel Times 1 through 4 and the Fast-stop Time determine the time required to decelerate from the value set in C1-14 (Accel/
Decel Rate Frequency ) to 0 Hz.
Frequency
reference = 60 Hz
C1-14 = 40 Hz
Figure 5.25 Accel/Decel Rate, Example 2 (C1-14 = 40 Hz, E1-04 = 60 Hz, Frequency Reference = 60 Hz)
C1-14 = 80 Hz
Frequency
reference = 60 Hz
Figure 5.26 Accel/Decel Rate, Example 3 (C1-14 = 80 Hz, E1-04 = 60 Hz, Frequency Reference = 60 Hz)
Note: 1. The accel/decel times shown in
decel at stop of 0.00 s (parameters C2-01 to C2-04).
2. When Stall Prevention during acceleration is enabled (L3-01 ≠ 0), the accel time may take longer than the set value.
3. When Stall Prevention during deceleration is enabled (L3-04 ≠ 0), the decel time may take longer than the set value.
C2: S-Curve Characteristics
u
Use S-curve characteristics to smooth acceleration and deceleration and to minimize abrupt shock to the load. Set S-curve
characteristic time during acceleration/deceleration at start and acceleration/deceleration at stop. If a STo fault (Step Out
Detection) occurs when starting a PM motor, try increasing the value set to C2-01.
142
Output
frequency
0
Accel Times 1 to 4
Output
frequency
0
Accel Times 1 to 4
Figure 5.24 to Figure 5.26
Decel Times 1 to 4
Decel Times 1 to 4
assume S-curve characteristic time during accel/decel at start and accel/
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
Time
Time