Danfoss VLT AutomationDrive FC 300 User Manual

brake is closed from start up until the output current is
above the level selected in 2-20 Release Brake Current.
During stop, the mechanical brake activates when the
speed falls below the level specified in 2-21 Activate Brake
Speed [RPM]. If the frequency converter enters an alarm
condition or an over-current or over-voltage situation, the
mechanical brake immediately cuts in. This is also the case
during safe stop.
NOTE
Protection mode and trip delay features (14-25 Trip Delay
at Torque Limit and 14-26 Trip Delay at Inverter Fault) may
delay the activation of the mechanical brake in an alarm
condition. These features must be disabled in hoisting
applications.
Start
term.18
1=on
0=o
Shaft speed
Start delay time
on
o
Brake delay time
Time
Output current
Relay 01
Pre-magnetizing
current or
DC hold current
Reaction time EMK brake
Par 2-20
Release brake current
Par 1-76 Start current/
Par 2-00 DC hold current
Par 1-74
Start speed
Par 2-21
Activate brake
speed
Mechanical brake
locked
Mechanical brake
free
Par 1-71
Par 2-23
130BA074.12
Illustration 6.8
2-20 Release Brake Current
Range: Function:
par. 16-37 A* [0.00 - par. 16-37 A]
2-21 Activate Brake Speed [RPM]
Range: Function:
0 RPM* [0 - 30000
RPM]
Set the motor speed for activation of
the mechanical brake, when a stop
condition is present. The upper speed
limit is specified in 4-53 Warning Speed
High.
2-22 Activate Brake Speed [Hz]
Range: Function:
0 Hz* [0.0 - 5000.0 Hz]
2-23 Activate Brake Delay
Range: Function:
0.0 s* [0.0 -
5.0 s]
Enter the brake delay time of the coast after
ramp-down time. The shaft is held at zero
speed with full holding torque. Ensure that the
2-23 Activate Brake Delay
Range: Function:
mechanical brake has locked the load before
the motor enters coast mode. See Mechanical
Brake Control in the FC 300 Design Guide,
MG33BXYY.
2-24 Stop Delay
Range: Function:
0.0 s* [0.0 - 5.0 s] Set the time interval from the moment
when the motor is stopped until the brake
closes. This parameter is a part of the
stopping function.
2-25 Brake Release Time
Range: Function:
0.20 s* [0.00 - 5.00
s]
This value defines the time it takes for
the mechanical brake to open. This
parameter must act as a time-out when
brake feedback is activated.
How to Programme the Low Ha... VLT Automation Low Harmonic Drive Operating Instructions
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6
6

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English