Yaskawa AC Drive P1000 Bypass Technical Manual - Manual (Page 85)

Setting 0: Reverse Enabled
Possible to operate the motor in both forward and reverse directions.
Setting 1: Reverse Disabled
Drive disregards a Reverse run command or a negative frequency reference.
u b2: DC Injection Braking and Short Circuit Braking
These parameters determine operation of the DC Injection Braking, Zero Speed Control, and Short Circuit Braking features.
n b2-01: DC Injection Braking Start Frequency
Active when “Ramp to Stop” is selected as the stopping method (b1-03 = 0).
No. Name Setting Range Default
b2-01 DC Injection Braking Start Frequency 0.0 to 10.0 Hz 0.5 Hz
b2-01 sets the starting frequency for DC Injection Braking at Stop. When the output frequency falls below the setting of b2-01,
DC Injection Braking is enabled for the time set in parameter b2-04.
Output
frequency
Time
b2-04
DC Injection
Braking
E1-09 Min. Frequency
b2-01 Zero Speed Level
Figure 5.6 DC Injection Braking at Stop for V/f
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.
n b2-02: DC Injection Braking Current
Sets the DC Injection Braking current as a percentage of the drive rated current. The carrier frequency is automatically reduced
to 1 kHz when this parameter is set to more than 50%.
No. Name Setting Range Default
b2-02 DC Injection Braking Current 0 to 100% 50%
The level of DC Injection Braking current affects the strength of the magnetic field attempting to lock the motor shaft.
Increasing the current level will increase the amount of heat generated by the motor windings. Do not set this parameter higher
than the level necessary to hold the motor shaft.
n b2-03: DC Injection Braking Time at Start
Sets the time of DC Injection Braking at start. Used to stop a coasting motor before restarting it or to apply braking torque at
start. Disabled when set to 0.00 s.
No. Name Setting Range Default
b2-03 DC Injection Braking Time at Start 0.00 to 10.00 s 0.00 s
Note: Before starting an uncontrolled rotating motor (e.g., a fan motor driven by windmill effect), use DC Injection or Speed Search to stop the
motor or detect motor speed before starting it. Otherwise, motor stalling and other faults can occur.
n b2-04: DC Injection Braking Time at Stop
Sets the time of DC Injection Braking at stop. Used to completely stop a motor with high inertia load after ramp down. Increase
the value if the motor still coasts by inertia after it should have stopped. Disabled when set to 0.00 s.
No. Name Setting Range Default
b2-04 DC Injection Braking Time at Stop 0.00 to 10.00 s 0.50 s
u b3: Speed Search
The Speed Search function allows the drive to detect the speed of a rotating motor shaft that is driven by external forces and
start the motor operation directly from the detected speed without first stopping the machine.
5.2 b: Application
YASKAWA SIEP YAIP1B 01A YASKAWA AC Drive – P1000 Bypass Technical Manual 85
5
Programming