Baldor VS1GV21-1B Installation & Operating Manual page 103

Parameter (Number)
Block Title
DC BRAKE TRIGGER (2505)
BRAKE
ADJUST Only available or active in V/F
(Continued) mode. Ignore for Open/Closed
Vector mode.
BRAKE ON STOP (2506)
BRAKE ON REVERSE (2507)
Only available or active in V/F
mode. Ignore for Open/Closed
Vector mode.
STOP BRAKE TIME (2508)
Only available or active in V/F
mode. Ignore for Open/Closed
Vector mode.
BRAKE ON START (2509)
Only available or active in V/F
mode. Ignore for Open/Closed
Vector mode.
START BRAKE TIME (2510)
Only available or active in V/F
mode. Ignore for Open/Closed
Vector mode.
MN765
Table 7-2 Level 2 Parameter Block Definitions Continued
Selection (Value)
Preset Value: 0.00
Range: 0.00 - 50.00 Hz
The frequency at which dc injection braking will begin.
Preset Value: 0
Range: 0 - 1
Off (0) DC Injection Braking not active.
On (1) Enables DC Injection Braking.
DC injection braking will begin when a stop command is issued. After a stop
command, the DC brake voltage will be applied to the motor windings when
the output frequency reaches the DC brake trigger.
Preset Value: 0
Range: 0 - 1
Off (0) Brake on Reverse not active.
On (1) DC Injection Braking enabled on a "Change Motor Rotation Direction"
command.
DC Injection braking will begin after a change-motor-rotation command is
issued. After a stop command, the DC brake voltage will be applied to the
motor windings when the output frequency reaches the DC brake trigger.
Braking continues until the motor is stopped or until stop brake time is
exhausted. The motor will then accelerate in the opposite direction.
Preset Value: 0.0
Range: 0.0 - 60.0 seconds
The maximum number of seconds that DC injection brake voltage will be
applied to the motor windings after a stop command. After the time specified
by this value, DC injection braking is automatically turned off. If DC injection
braking starts at a frequency less than the DC brake trigger parameter, the
stop brake time is calculated as follows:
BrakeTime = StopBrakeTime X (OutputFrequencyatBraking /
DCBrakeTrigger)
Preset Value: 0
Range: 0 - 1
Off (0) Brake on Start not active.
On (1) Enables Brake on Start.
ON turns DC injection braking ON for a period of time (Start Brake Time)
when a run command is issued. This ensures the motor is not rotating.
Braking will automatically turn off and the motor will accelerate at the end of
the start brake time.
Preset Value: 0.0
Range: 0.0 - 60.0 seconds
The amount of time that DC injection braking will be applied after a run
command is issued. This will only occur if brake on start is set to ON. Braking
may cause the motor to overheat for applications that require frequent starts/
stops. Be careful in selecting this value. The start brake time should be just
long enough to ensure the motor shaft is not rotating when a start command
is issued.
Parameter Name and Description
Parameter Descriptions 7-25