YASKAWA OYMC V1000, Programming Manual

Page: 31 / 408

1.1 A: Initialization
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 31
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When an external Baseblock command is present while a Run command is active, the
frequency reference will be kept as long as the Run command is active. To avoid improper
brake operation make sure that frequency detection is set so that the brake does not open
during Baseblock (L4-07 = “0”, default).
The table below shows how to set up the drive when using output terminals P1-PC as
brake control output.
Figure 1.1
Figure 1.1 Frequency Detection 2
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.
3. 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).
4. A sequence to open and close the holding brake appears in the diagram below.
Brake Open/Close
<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.
Brake Activation Level Control Mode
Function Parameter Signal Parameter V/f OLV
OLV for
PM
Frequency
Detection 2
L4-07 = 0 Frequency Detection Level L4-01 = 1.0 to 3.0 Hz
<1>
−
H2-02 = 5 Frequency Detection Width L4-02 = 0.0 to 0.5 Hz
<2>
L4-02
L4-01
OFF
ON
Output
frequency
Frequency
Dectection 2
Time