YASKAWA Z1000 - Page 54

Switching Acceleration Times by Digital Input
Accel/decel time 1 is active by default if no input is set.
Table i.25 Accel/Decel Time Selection by Digital Input
Accel/Decel Time Sel. 1
H1-oo = 7
Active Times
Acceleration Deceleration
0 C1-01 C1-02
1 C1-03 C1-04
Figure i.51 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
Accel 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 command
ON
OFF
ON
ON
Accel/Decel Time Selection 1
(Terminals S1 to S7, H1-oo = “7”)
Figure i.51 Timing Diagram of Accel/Decel Time Change
Switching Accel/Decel Times by a Frequency Level
The 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 the
frequency level set in parameter C1-11. When the frequency falls below this level, the accel/decel times are switched back.
Figure i.52 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 the
selected time.
Output Frequency
C1-11
Accel/Decel Time
Switch Frequency
C1-03
setting
When the output frequency C1-11, drive uses Accel/Decel Time 1 (C1-01, -02)
When the output frequency < C1-11, drive uses Accel/Decel Time 2 (C1-03, -04)
C1-01
setting
C1-02
setting
C1-04
setting
C1-03 =
(accel time from 0 Hz to C1-11) × (E1-04)
C1-11
C1-01 =
(accel time between C1-11 and E1-04) × (E1-04)
(E1-04 - C1-11)
C1-02 =
(decel time between E1-04 and C1-11) × (E1-04)
(E1-04 - C1-11)
C1-04 =
(decel time from C1-11 to 0 Hz) × (E1-04)
C1-11
Figure i.52 Accel/Decel Time Switching Frequency
n
C6-02: Carrier Frequency Selection
Sets the switching frequency of the drive output transistors. Changes to the switching frequency lower audible noise and reduce
leakage current.
Note: Increasing the carrier frequency above the default value automatically lowers the drive current rating.
No. Parameter Name Setting Range Default
C6-02 Carrier Frequency Selection 1 to 5; 7 to 9; A to F Determined by A1-02 and o2-04
Settings:
C6-02 Carrier Frequency
1 2.0 kHz
C6-02 Carrier Frequency
2 5.0 kHz
i.5 Start-Up Programming and Operation
54
YASKAWA ELECTRIC TOEP C710616 54A YASKAWA AC Drive - Z1000 Quick Start Guide