B2: Dc Injection Braking And Short Circuit Braking - YASKAWA GA500 GA50U Series Programming Manual

The drive does not start to operate the application when you apply power, even when there is an existing Run
command.
Enter the Run command again to operate the application.
Note:
When you energize the drive,
1 : Accept Existing RUN Command
When there is an existing Run command, the drive starts to operate the application when you apply power.
WARNING! Sudden Movement Hazard. When you use a 3-Wire sequence, set A1-03 = 3330 [Initialize Parameters = 3-Wire
Initialization] and make sure that b1-17 = 0 [Run Command at Power Up = Disregard Existing RUN Command] (default). If you do
not correctly set the drive parameters for 3-Wire operation before you energize the drive, the motor can suddenly rotate when you
energize the drive.
■
b1-35: Digital Input Deadband Time
No.
Name
(Hex.)
b1-35 Digital Input Deadband
Time
(1117)
Expert
When the on/off time for MFDIs is longer than the time set in b1-35, the drive activates the MFDI. Set this parameter
to prevent malfunctions caused by relay chattering for applications in which relays send input to MFDI terminals.
◆

b2: DC Injection Braking and Short Circuit Braking

b2 parameters set the DC Injection Braking and Short Circuit Braking functions.
• DC Injection Braking: A braking method that injects DC current into the motor windings. This function should not
be used too frequently, because it generates a fair amount of heat in the motor.
• Short Circuit Braking: A braking method for PM motors.
■
b2-01: DC Injection/Zero SpeedThreshold
No.
Name
(Hex.)
b2-01 DC Injection/Zero
SpeedThreshold
(0189)
Note:
This parameter is available when b1-03 = 0 [Stopping Method Selection = Ramp to Stop].
When the control method selected in A1-02 [Control Method Selection] changes, the b2-01 function changes.
YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
on the keypad will flash quickly if the Run command is already enabled from an external source.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the deadband time for MFDIs.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the frequency to start DC Injection Braking or Short Circuit Braking near the end of a stop ramp.
Description
Description
2.3 b: Application
Default
(Range)
0.0 ms
(0.0 to 100.0 ms)
Default
(Range)
Determined by A1-02
(0.0 - 10.0 Hz)
2
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