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<1> This is the setting recommended when using Open Loop Vector Control. In V/f Control, set the level as the motor rated slip frequency plus 0.5 Hz.
Not enough motor torque will be created if this value is set too low, and the load may tend to slip. Make sure this value is greater than the minimum
output frequency and greater than the value of L4-02 as shown in the diagram below. If set too high, however, there may be a jolt at start.
<2> Hysteresis for Frequency Detection 2 can be adjusted by changing the Frequency Detection Width (L4-02) between 0.0 and 0.5 Hz. If the load slips
during stop, make changes in steps of 0.1 Hz until the load no longer slips.
L4-02
L4-01
OFF
ON
Time
Output
frequency
Frequency
detection 2
Figure 4.10 Frequency Detection 2
The braking sequence should be designed as follows:
• A normally open signal (N.O.) should be used to control the brake so that it is released when terminal P2-PC closes.
• When an Up or Down command is entered, the brake should release.
• When a fault signal is output, the brake should close.
• When changing the speed using an analog signal, make sure that the source of the frequency reference is assigned to the
control circuit terminals (b1-01 = 1).
• A sequence to open and close the holding brake appears in the diagram below.
Time
UP
S1-SC
S6-SC
OFF
OFF
d1-03
d1-01 (Enabled when b1-01 = 0)
L4-01
b2-01
OFF
DC Injection braking
ON
ON
ON
P2-PC
Holding brake
Fast/Slow
Output frequency
0
Frequency Detection 2
(H2-03
=
05)
Closed
Closed
Open
b6-02
b6-01
Input
Output
Figure 4.11 Holding Brake Time Chart
u
Setting 7: Preset 7
Table 4.17 Preset 7: Parameters and Settings
No.
Parameter Name
Default Setting
A1-02
Control Method Selection
0: V/f Control
b1-01
Frequency Reference Selection 1
0: Operator
C1-01
Acceleration Time 1
3.0 s
C1-02
Deceleration Time 1
3.0 s
C6-01
Drive Duty Selection
0: Heavy Duty
C6-02
Carrier Frequency Selection
2: 5 kHz
d1-01
Frequency Reference 1
6.0 Hz
d1-02
Frequency Reference 2
30.0 Hz
d1-03
Frequency Reference 3
60.0 Hz
H1-05
Multi-Function Digital Input Terminal S5 Function
3: Multi-Step Speed 1
H1-06
Multi-Function Digital Input Terminal S6 Function
4: Multi-Step Speed 2
H2-02
Terminals P1 Function Selection
37: During frequency output
L3-04
Stall Prevention Selection during Deceleration
0: Disabled
L8-05
Input Phase Loss Protection Selection
1: Enabled
<1>
4.6 Application Selection
100
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual