11.2 A: Initialization Parameters
580 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
DC Injection Braking at Stop, Zero Speed Control Function
Note:
If you must disconnect the drive from the motor when you stop the elevator, make sure that you fully close the holding brake and
disconnect the drive during baseblock (i.e., while the baseblock signal is ON). This is not applicable in emergencies. If you disconnect
the drive from the motor when the drive is controlling the motor or during DC Injection Braking (Zero speed level), a voltage surge can
trigger a fault. When you use an electromagnetic contactor between the drive and motor, set L8-07 = 1 or 2 [Output Phase Loss
Protection Sel = Fault when one phase is lost, Fault when two phases are lost].
Adjustment Parameter Name
b2-01 DC Injection/Zero SpeedThreshold
b2-02 DC Injection Braking Current
b2-04 DC Inject Braking Time at Stop
H2-xx = 5 Frequency Detection 2
Figure 11.6 DC Injection Braking at Stop, Zero Speed Control Function
Note:
If the mechanical operation of the holding brake is slow, use DC Injection Braking (zero speed control when set to Closed Loop Vector)
until the brake is fully closed to prevent rollback.
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