B2: Dc Injection Braking And Short Circuit Braking - YASKAWA A1000 Series Technical Manual

5.2 b: Application
Setting 1: Run command and power up is issued
If an external Run command is active when the drive is powered up, then the drive will start to operate the motor as soon
as it gets ready for operation (i.e., once the internal start up process is complete).
WARNING! Sudden Movement Hazard. If b1-17 is set to 1 and an external Run command is active during power up, the motor will
begin rotating as soon as the power is switched on. Proper precautions must be taken to ensure that the area around the motor is safe
prior to powering up the drive. Failure to comply may cause serious injury.

◆ b2: DC Injection Braking and Short Circuit Braking

These parameters determine how the DC Injection Braking, Zero Speed Control, and Short Circuit Braking features
operate.
b2-01: DC Injection Braking Start Frequency
■
Parameter b2-01 is active when "Ramp to stop" is selected as the stopping method (b1-03 = 0).
No.
b2-01
The function triggered by parameter b2-01 depends on the control mode that has been selected.
V/f, V/f w/PG and OLV (A1-02 = 0, 1, 2)
For these control modes, parameter b2-01 sets the starting frequency for DC Injection Braking at stop. Once the output
frequency falls below the setting of b2-01, DC Injection Braking is enabled for the time set in parameter b2-04.
Figure 5.13
Note: If b2-01 is set to a smaller value than parameter E1-09 (minimum frequency), then DC Injection Braking will begin as soon as
the frequency falls to the value set to E1-09.
OLV/PM and AOLV/PM (A1-02 = 5, 6)
For these control modes, parameter b2-01 sets the starting frequency for Short-Circuit Braking at stop. Once the output
frequency falls below the setting of b2-01, Short-Circuit Braking is enabled for the time set in parameter b2-13. If DC
Injection Braking time is enabled at stop, then DC Injection Braking is performed for the time set in b2-04 after Short-
Circuit Braking is complete.
Figure 5.14
Note: If b2-01 is set to a smaller value than parameter E1-09 (minimum frequency), then DC Injection Braking will begin as soon as
the frequency falls to the value set to E1-09.
CLV and CLV/PM (A1-02 = 3, 7)
For these control modes, parameter b2-01 sets the starting frequency for Zero Speed Control (not position lock) at stop.
Once the output frequency falls below the setting of b2-01, Zero Speed Control is enabled for the time set in parameter
b2-04 if b1-05 = 0.
Figure 5.15
Note: If b2-01 is set to lower than the minimum frequency (E1-09), then Zero Speed Control begins at the frequency set to E1-09.
144
Name
DC Injection Braking Start Frequency
Output
frequency
Figure 5.13 DC Injection Braking at Stop for V/f, V/f w/PG and OLV
E1-09 Min. Frequency
b2-01 Zero Speed Level
Output
frequency
Figure 5.14 Short-Circuit Braking at Stop in OLV/PM and AOLV/PM
E1-09 Min. Frequency
b2-01 Zero Speed Level
Output
frequency
Figure 5.15 Zero Speed Control at Stop in CLV and CLV/PM
DC Injection
Braking
E1-09 Min. Frequency
b2-01 Zero Speed Level
b2-04
Short Circuit
Braking
b2-13
Zero Speed
Control
b2-04
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting Range
0.0 to 10.0 Hz
Time
DC Injection
Braking
Time
b2-04
Time
Default
Determined by A1-02