YASKAWA A1000 Series Quick Start Manual page 72

4 Start-Up Programming & Operation
Accel/Decel Time 1 (H1-
Open
Closed
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 4 in C1-07 and C1-08 to the default accel/decel time in C1-01 and C1-02 (C1-05 and C1-06 for motor 2)
when the output frequency exceeds the frequency level set in parameter C1-11. When it falls below this level, the accel/
decel times are switched back.
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 this time only and not switch from accel/decel time
4 to the selected one.
Figure 64
C6-01: Drive Duty Mode Selection
■
The drive has two different "duty modes" to select from based on the load characteristics. The drive rated current,
overload capacity, and maximum output frequency will change depending upon the duty mode selection. Use parameter
C6-01 to select Heavy Duty (HD) or Normal Duty (ND) for the application. The default setting is ND. Refer to
Duty and Normal Duty Ratings on page 124
No.
C6-01
Characteristics
C6-01
Performance
Application
Over load capability (oL2)
Stall Prevention during
Acceleration (L3-02)
Stall Prevention during
Run (L3-06)
Default Carrier Frequency
Note: By changing the Duty Mode selection, the maximum size motor the drive can run changes, and the E2-
automatically set to appropriate values (E4-
automatically when the Duty Mode selection is changed. This includes b8-04, L2-03, n5-02, L3-24, C5-17, and C5-37.
72
Table 24 Motor Switching and Accel/Decel Time Combinations
Motor 1 Selected (Terminal set to H1-
= 7)
Accel
C1-01
C1-03
Figure 64 shows an operation example.
Output Frequency
C1-11
Accel/Decel Time
Switch Frequency
C1-07
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 (C1-07, -08)
Figure 64 Accel/Decel Time Switching Frequency
for details about the rated current.
Parameter Name
Duty Mode Selection
Table 25 Differences between Heavy and Normal Duty
Heavy Duty Rating (HD)
0
Overload
150%
Rated Load
100%
0 Motor Speed
Use Heavy Duty Rating for applications requiring a high
overload tolerance with constant load torque. Such
applications include extruders and conveyors.
150% of drive rated Heavy Duty current for 60 s
150%
150%
2 kHz
for motor 2). Parameters settings determined by motor capacity are recalculated
=16 OFF)
Decel
C1-02
C1-04
C1-01 C1-02 C1-08
setting setting setting
100%
Use Normal Duty Rating for applications in which the
torque requirements drop along with the speed. Examples
include fans and pumps where a high overload tolerance is
not required.
120% of drive rated Normal Duty current for 60 s
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Motor 2 Selected (Terminal set to H1-
=16 ON)
Accel
C1-05
C1-07
Setting Range
0 or 1
Normal Duty Rating (ND)
1
Overload
120%
Rated Load
100%
0
Motor Speed
120%
120%
2 kHz Swing PWM
parameters are
Decel
C1-06
C1-08
Heavy
Default
0 (HD)
100%