Yaskawa Z1000 AC Drive HVAC - Manual (Page 163)

Setting 0: Reverse Disabled
Negative PI output will be limited to zero and the drive output will be stopped.
Setting 1: Reverse Enabled
Negative PI output will cause the drive to run in the opposite direction.
n C2-01 and C2-02: S-Curve Characteristics
C2-01 and C2-02 set separate S-curves for each section of the acceleration or deceleration.
No. Parameter Name Setting Range Default
C2-01 S-Curve Characteristic at Accel Start
0.00 to 10.00 s
Determined by
A1-02
C2-02 S-Curve Characteristic at Accel End 0.20 s
Figure 4.30 illustrates S-curve application.
C2-02
C2-01
0.20 s
<1>
0.20 s <1>
C2-02
C2-01
0.20 s <1>
0.20 s <1>
FWD run
REV run
Output
frequency
<1> S-Curve characteristic at Decel Start/End is fixed to 0.20 s.
Figure 4.30 S-Curve Timing Diagram - FWD/REV Operation
Setting the S-curve will increase the acceleration and deceleration times.
Actual accel time = accel time setting + (C2-01 + C2-02) / 2
n C6-03, C6-04, C6-05: Carrier Frequency Upper Limit, Lower Limit, Proportional Gain
Note: C6-04 and C6-05 are available in V/f Control mode only.
These parameters set a user-defined or a variable carrier frequency. Set C6-02 to F to set the upper and lower limits and the
carrier frequency proportional gain.
No. Parameter Name Setting Range Default
C6-03 Carrier Frequency Upper Limit 1.0 to 15.0 kHz
Determined by
C6-02
C6-04 Carrier Frequency Lower Limit (V/f Control only) 1.0 to 15.0 kHz
C6-05 Carrier Frequency Proportional Gain (V/f Control only) 0 to 99
Setting a Fixed User-Defined Carrier Frequency
A carrier frequency between the fixed selectable values can be entered in parameter C6-03 when C6-02 is set to F.
In V/f Control, adjust parameter C6-04 to the same value as C6-03.
Setting a Variable Carrier Frequency (V/f Control)
In V/f Control, the carrier frequency can be set up to change linearly with the output frequency by setting the upper and lower
limits for the carrier frequency and the carrier frequency proportional gain (C6-03, C6-04, C6-05) as shown in Figure 4.31 .
4.13 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 163
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Start-Up Programming & Operation