Danfoss VLT AutomationDrive FC 302 Design Guide

FC 300 Design Guide
How to Program
Enabled(notatstop) [1]
Enabled [2]
Function:
The Over-voltage Control is selec ted to reduce the
risk for the drive to trip by an overvoltage on the
DC link caused by generative power from the load.
Enabled(notatstop), means that OVC is active
except when stopping with a stop sig nal applied.
" 2-2* Mechanical Br ak e
For most hoisting applications, it is necessary to
control an electromagnetic brake. To control the
brake, a relay o utput (relay 0 1 or relay 02) or a
programmed digital output (terminal 27 or 29) is
required. Normally, this output must be closed
during the time when the drive is unable to "hold"
the motor, e.g. because of too high l oad.
Select Mechanical Brake Control [32] for applications
with an ele ctrom agnetic brake in par. 5-40 (Array
parameter), par. 5-30, or p ar. 5-31 (digital output
27 or 29). When selecting Mechanical brake control
[32], the mechanical brake is closed during start
until the output current is above the level selected in
par. 2-20 Re leas e B rake Current.Duringstop,the
mechanical b rake activates when the sp eed is below
the level selected in par. 2-21 Activate Brake Speed
[RPM]. If the adjustable frequency drive enters into
an alarm condition or an overcurrent or overvoltage
situation, the mechanical brake immediately cuts
in. This i s also the ca se during safe sto p.
2-20 Relea s e Brake Current
Range:
0.00 - par. 4-51 A
*
0.00A
Function:
Set the motor current for release of the mechanical
brake, if a start condition is present.
2-21 Activate Brake Speed [RPM]
Range:
0-par. 4-53RPM
*
0RPM
Function:
Set the motor speed for activating the mechanic al
brake, if a stop condition is present.
2-22 Activa te Brake Speed [Hz]
Range:
0-Max. speed
*
0Hz
Function:
Set the moto r frequency for activating the
mechanical brake, if a stop condition is present.
2-23 Activa te Brake Del ay
Range:
0.0 - 5.0 s
*
0.0s
Function:
Sets the brake d elay time of the coast after
ramp-down time. The shaft is held at zero spee d
with full holding torque. Ensure that the mechanic al
brakehaslockedtheloadbeforethemotorenters
coast m ode. See section Mechanical Brake.
*
default setting ()display text []value for use in communication via serial communication port
153
MG.33.B
3.22 - VLT is a registered Danfoss trademark

Danfoss VLT AutomationDrive FC 302 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 302
Category	DC Drives
Language	English