5.3 C: Tuning 5.3 C: Tuning C parameters are used to set the acceleration and deceleration characteristics, as well as S-curves. Other parameters in this group cover settings for slip compensation, torque compensation, and carrier frequency. u C1: Acceleration and Deceleration Times n C1-01 to C1-04: Accel/Decel Times 1 and 2 Two sets of acceleration and deceleration times can be set in the drive. They can be selected by a digital input. Acceleration time parameters always set the time to accelerate from 0 to the maximum output frequency (E1-04). Deceleration time parameters always set the time to decelerate from maximum output frequency to 0.
C1-01 and C1-02 are the default active accel/decel settings. Switching Acceleration Times by Digital Input Accel/decel times 1 are active by default if no input is set. The accel/decel time 2 can be activated by a digital input (H1- = 7) as explained in Table 5.5 . Table 5.5 Accel/Decel Time Selection by Digital Input Figure 5.5 shows an operation example for changing accel/decel. times. The example below requires that the stopping method be set for "Ramp to Stop" (b1-03 = 0). Output frequency FWD (REV) Run command Accel/Decel Time Selection (Digital Input H1-0x = “7”) Parameter Details Figure 5.5 Timing Diagram of Accel/Decel Time Change n C1-09:
Fast-stop Time Parameter C1-09 will set a special deceleration that is used when certain faults occur or that can be operated by closing a digital input configured as H1- = 15 (N.O. input) or H1- = 17 (N.C. input). The input does not have to be closed continuously, even a momentary closure will trigger the Fast-stop operation. Unlike standard deceleration, once the Fast-stop operation is initiated, the drive cannot be restarted until the deceleration is complete, the Fast-stop input is cleared, and the Run command is cycled. A digital output programmed for “During Fast-stop” (H2-01/02/03 = 4C) will be closed as long as Fast-stop is active. 5 NOTICE:
Rapid deceleration can trigger an overvoltage fault. When faulted, the drive output shuts off, and the motor coasts. To avoid this uncontrolled motor state and to ensure that the motor stops quickly and safely, set an appropriate Fast-stop time to C1-09. u C2: S-Curve Characteristics Use S-curve characteristics to smooth acceleration and deceleration and to minimize abrupt shock to the load. SIEP C710606 33A OYMC AC Drive – J1000 User Manual 77 No. Parameter Name Setting Range Default C1-01 Acceleration Time 1 0.0 to 6000.0 s 10.0 s C1-02 Deceleration Time 1 C1-03 Acceleration Time 2 C1-04 Deceleration Time 2 Accel/Decel Time Sel.
H1- = 7 Active Times Acceleration Deceleration 0 C1-01 C1-02 1 C1-03 C1-04 Decel Time 1 (C1-02) Decel Time 2 Accel Time 1 Accel Time 2 (C1-04) (C1-01) (C1-03) Decel Time 1 (C1-02) ON OFF ON ON ON ection ON No. Parameter Name Setting Range Default C1-09 Fast-stop Time 0.0 to 6000.0 s 10.0 s