N O T I C E
Protection mode and trip delay features (
parameter 14-25 Trip Delay at Torque Limit
and
parameter 14-26 Trip Delay at Inverter
Fault
) may delay the activation of the mechanical braking in an alarm condition. These features must be disabled in hoisting ap-
plications.
Start
term.18
1=on
0=off
Shaft speed
Start delay time
on
off
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
e
3
0
b
a
0
7
4
.1
3
Illustration 40: Mechanical Braking
Parameter 2-20 Release Brake Current
Table 162: Parameter 2-20 Release Brake Current
2-20 Release Brake Current
Default value: Size related
Parameter type: Range, 10 - par. 16-37 A
Setup: All setups
Conversion index: -2
Data type: Uint32
Change during operation: True
Set the motor current for release of the mechanical braking when a start condition is present. The default value is the maximum
current the inverter can provide for the particular power size. The upper limit is specified in
parameter 16-37 Inv. Max. Current
.
N O T I C E
When mechanical brake control output is selected, but no mechanical braking is connected, the function does not work by de-
fault setting due to too low motor current.
Parameter 2-21 Activate Brake Speed [RPM]
Table 163: Parameter 2-21 Activate Brake Speed [RPM]
2-21 Activate Brake Speed [RPM]
Default value: Size related
Parameter type: Range, 0 - par. 4-53 RPM
Setup: All setups
Conversion index: 67
Data type: Uint16
Change during operation: True
Set the motor speed for activation of the mechanical braking when a stop condition is present. The upper speed limit is specified in
parameter 4-53 Warning Speed High
.
AU373327181955en-000101 / 130R1208 | 103
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide