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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

    Table 1 shows examples of parameter settings to use the terminal P2-C2 as the holding brake open and close signal.

Table 1. Holding Brake Open and Close Signal Setting Example

Brake Open and Close Signal

Brake Open and Close Level Adjust

Applicable Control Methods (A1-02 Settings)

Signal Name

Parameter Settings

Signal Name

Parameter Settings

V/f

(0)

OLV

(2)

Frequency (FOUT) Detection 2

L4-07 = 0

Speed Agree Detection Level

L4-01 = 1.0 Hz to 3.0 Hz1

x

x

H2-03 = 5

Speed Agree Detection Width

L4-02 = 0.0 Hz to 0.5 Hz
2
Figure 1. Frequency Detection 2
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. Set the parameter to agree with these conditions at the same time. If you set the value too high, it will cause overshoot at start.

  • L4-01 > E1-09 [Minimum Output Frequency]

  • L4-01 > L4-02 [Speed Agree Detection Width]

2

Use L4-02 to adjust the detection width of Frequency Detection 2. If rollback occurs when the motor stops, change the frequency to approximately 0.1 Hz.