1.3 C: TuningC parameters set the characteristics for acceleration, deceleration, and S-curves. Other parameters in the C group cover settingsfor slip compensation, torque compensation, and carrier frequency.u C1: Acceleration and Deceleration Timesn C1-01 to C1-04: Accel, Decel Times 1 and 2Four different sets of acceleration and deceleration times can be set in the drive by digital inputs, motor selection, or switchedautomatically.Acceleration time parameters always set the time to accelerate from 0 Hz to the maximum output frequency (E1-04).Deceleration time parameters always set the time to decelerate from maximum output frequency to 0 Hz. C1-01 and C1-02are the default active accel/decel settings.No. Parameter Name Setting Range DefaultC1-01 Acceleration Time 10.1 to 6000.0 s 30.0 sC1-02 Deceleration Time 1C1-03 Acceleration Time 2C1-04 Deceleration Time 2Switching Acceleration Times by Digital InputAccel/decel time 1 is active by default if no input is set.Table 1.13 Accel/Decel Time Selection by Digital InputAccel/Decel Time Sel. 1H1-oo = 7Active TimesAcceleration Deceleration0 C1-01 C1-021 C1-03 C1-04Figure 1.19 shows an operation example for changing accel/decel. times. The example below requires that the stopping methodbe set for “Ramp to stop” (b1-03 = 0).OutputfrequencyAccel Time 1(C1-01)Decel Time 1(C1-02) Accel Time 2(C1-03)Decel Time 2(C1-04)Decel Time 1(C1-02)FWD (REV)Run commandON OFF ONONAccel/Decel Time Selection 1(Terminals S1 to S7, H1- oo = “7”)Figure 1.19 Timing Diagram of Accel/Decel Time ChangeSwitching Accel/Decel Times by a Frequency LevelThe drive can switch between different acceleration and deceleration times automatically. The drive will switch from accel/decel time 2 in C1-03 and C1-04 to the default accel/decel time in C1-01 and C1-02 when the output frequency exceeds thefrequency level set in parameter C1-11. When the frequency falls below this level, the accel/decel times are switched back.Figure 1.20 shows an operation example.Note: Acceleration and deceleration times selected by digital inputs have priority over the automatic switching by the frequency level set to C1-11.For example, if accel/decel time 2 is selected, the drive will use only accel/decel time 2; it will not switch from accel/decel time 2 to theselected time.1.3 C: Tuning46 YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
