Notes On Controlling The Brake When Using The Hoist Application Preset - YASKAWA A1000 Technical Manual

 Notes on Controlling the Brake when Using the Hoist Application Preset

Prevent accidental Brake Release during Baseblock
The hoist application selection uses the frequency detection function for controlling the brake.
Although the drive output will be shut off, the drive still maintains the frequency reference if the Run command remains
active when an external Baseblock command is given (H1- = 8 or 9). Disable the frequency detection during
baseblock by setting parameter L4-07 = 0 to prevent the brake remaining open while the drive is in baseblock.

Controlling the Brake in Closed Loop Vector Control
For hoist applications using Closed Loop Vector Control, YASKAWA recommends setting the "During frequency
output" signal to a digital output (H2-01 = 37 for terminal M1-M2) in order to control the brake. This way, the brake will
always close during baseblock, and the setting of parameter L4-07 as described above will not affect brake control.

Brake Control During Safe Disable Input
If the Safe Disable input is triggered, the drive output will shut off and the frequency reference will reset to 0. The brake
will also close, regardless if the Run command is active. The Run command must be cycled before the drive can restart.

Related Parameter Settings
Table 4.18 shows the parameter settings needed when using output terminals M1-M2 as brake control output.
Function
Frequency Detection 2 Digital Output
(for brake control)
Speed Agreement Detection Level
(frequency for the brake to open)
Speed Agreement Width
(bandwidth for the brake to close)
Frequency Detection during Baseblock
DC Injection Braking Start Frequency
(frequency for the brake to close)
During Frequency Output
<1> This is the setting recommended when using Open Loop Vector Control. If using 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 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.
Figure 4.11
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Table 4.18 Parameter Settings for Brake Control Output (M1-M2)
Parameter
H2-01
L4-01
L4-02
L4-07
b2-01
H2-01
L4-01
Output
frequency
Frequency
Dectection 2
Figure 4.12 Frequency Detection 2
Setting
5
1.0 to 3.0 Hz
<1>
Use this setup for V/f control modes or Open Loop Vector
control
0.0 to 0.5 Hz
<2>
0
0.1 to 0.5 Hz
Use this setup in Closed Loop Vector control for IM or PM
motors
37
L4-02
ON
OFF
4.6 Application Selection
Comment
time
4
117