YASKAWA CR700 Technical Manual page 577

Notes when Opening and Closing the Brake Without the Crane Sequence
■
When you open or close the brake without the crane sequence, read the safety descriptions and precautions
carefully, and use the drive safely and correctly.
Conditions to Open and Close the Brake
Set L4-07 = 0 [Speed Agree Detection Selection = No Detection during Baseblock] to open and close the holding
brake.
When L4-07 = 1 [Detection Always Enabled], the output frequency increases when you input the Run command
although the external baseblock command is input. Because of this, speed detection operates and will open the
brake signal.
• Set Related Parameters
The table below shows examples of parameter settings to use the MFDO terminal (M1-M2) as the holding brake
open and close signal.
Brake Open and Close Signal
Signal Name Parameter Settings
L4-07 = 0
Frequency (FOUT)
Detection 2
H2-01 = 5
During Frequency Output H2-01 = 37
*1 When A1-02 = 2 [Open Loop Vector], it is the usual setting range. When A1-02 = 0 [V/f Control], set L4-01 to the rated slip
frequency of the motor + approximately 0.5 Hz. If you set the value too low, motor torque will not be sufficient and it will cause
motor rollback. Be sure to set the setting value to agree with these two conditions at the same time. However, if the setting value is
too high, shock will likely occur during start up.
• L4-01 > E1-09 [Minimum Output Frequency]
• L4-01 > L4-02 [Speed Agree Detection Width]
*2 The detection width of Frequency Detection 2 can be adjusted with L4-02. If rollback occurs when the motor is stopped, change the
frequency to approximately 0.1 Hz.
Sequence Circuit Configuration
Set the circuit for the open/close sequence of the holding brake as follows.
• Set the sequence which opens the holding brake by turning terminal M1-M2 on when the sequence side
operation conditions are met.
• Set the sequence so that the holding brake will be firmly closed when a fault signal is detected in the event of an
emergency.
• If a raise or lower command is entered, set the sequence so that the holding brake will be open.
*1 L4-07 = 0 [Speed Agree Detection Selection = No Detection during Baseblock] or During Frequency Output
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Table 11.8 Holding Brake Open and Close Signal Setting Example
Brake Open and Close Level Adjust
Signal Name
Speed Agree Detection
Level
Speed Agree Detection
Width
DC Injection/Zero
SpeedThreshold
Figure 11.1 Frequency Detection 2
Figure 11.2 Sequence Circuit Configuration Diagram
11.2 A: Initialization Parameters
Applicable Control Method (A1-02 Setting)
V/f
Parameter Settings
(0)
*1
L4-01 = 1.0 Hz to 3.0 Hz
x
*2
L4-02 = 0.0 Hz to 0.5 Hz
b2-01 = 0.1 Hz to 0.5 Hz -
OLV CLV AOLV
(2) (3) (4)
x - x
- x -
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