YASKAWA U1000 Quick Start Manual page 72

i.5 Start-Up Programming and Operation
Accel/Decel Time 1 (H1-oo = 7)
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 to parameter C1-11. When the frequency 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 only accel/decel time 2; it will not switch from accel/decel time 4 to the
selected one.
(accel time from 0 Hz to C1-11)
C1-03 =
(accel time between C1-11 and E1-04)
C1-01 =
(decel time between E1-04 and C1-11)
C1-02 =
(decel time from C1-11 to 0 Hz)
C1-04 =
n
C6-01: Drive Duty Mode Selection
The drive has two different duty modes from which to select 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. Refer to the U1000 Technical Manual for details.
No.
C6-01
Characteristics
C6-01
Performance
Use Heavy Duty Rating for applications requiring a high
Application overload tolerance with constant load torque, such as
extruders and conveyors.
Overload capability (oL2)
Stall Prevention during
Acceleration (L3-02)
Stall Prevention during
Run (L3-06)
Default Carrier Frequency
<1> Carrier frequency is 3 kHz for models 4o0477 to 4o0930.
Note:
Changing the Duty Mode selection automatically sets the E2-oo parameters to appropriate values (E4-oo for motor 2) and recalculates
parameter settings determined by motor capacity (e.g., b8-04, L2-03, n5-02, C5-17, and C5-37).
72
Table i.35 Motor Switching and Accel/Decel Time Combinations
Motor 1 Selected
(Terminal set to H1-oo = 16 OFF)
Accel
C1-01
C1-03
Figure i.63 shows an operation example.
×
(E1-04)
C1-11
×
(E1-04)
(E1-04 - C1-11)
×
(E1-04)
(E1-04 - C1-11)
×
(E1-04)
C1-11
Figure i.63 Accel/Decel Time Switching Frequency
Parameter Name
Duty Mode Selection
Table i.36 Differences between Heavy Duty and Normal Duty
Heavy Duty Rating (HD)
0
Overload
150 %
Rated Load
100 %
0 Motor Speed
150% of drive rated Heavy Duty current for 60 s
150%
150%
<1>
4 kHz
YASKAWA ELECTRIC TOEP C710636 04D U1000 Industrial MATRIX Drive Quick Start Guide
Decel
C1-02
C1-04
Output Frequency
C1-11
Accel/Decel Time
Switch Frequency
C1-03 C1-01
setting 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)
Setting Range
100 %
Use Normal Duty Rating for applications in which the torque
requirements drop along with the speed, such as fans and
pumps where a high overload tolerance is not required.
120% of drive rated Normal Duty current for 60 s
Motor 2 Selected
(Terminal set to H1-oo = 16 ON)
Accel
C1-05
C1-07
C1-02 C1-04
setting setting
Default
0, 1
Normal Duty Rating (ND)
1
Overload
120 %
Rated Load
100 %
0
Motor Speed
120%
120%
<1>
4 kHz
Decel
C1-06
C1-08
1 (ND)
100 %