Table of Contents
Advertisement
VACON® 3000
Application Guide
Output Frequency
Close Frequency Limit
ID1539
Open Frequency Limit
ID1535
Start Command
Open Mech. Brake
Command (Digital output)
Illustration 48: The Mechanical brake function
1.
A Start command is given.
2.
We recommend that you use start magnetization to
build rotor flux fast and to decrease the time when
the motor can produce nominal torque.
3.
When the start magnetization time is over, the sys-
tem lets the frequency reference go to the open fre-
quency limit.
4.
The mechanical brake opens. The frequency refer-
ence stays at the open frequency limit until the
brake mechanical delay is over, and the correct
brake feedback signal is received.
V
Running
GE
M
Output Frequency
IN
1
P
Open Freq Limit
IN
2
LE
M
Output Frequency
IN
1
P
Close Freq Limit
IN
2
NOT
V
Running
IN
NOT
V
Run Request
IN
V
Fault
LT
M
Motor Current
IN
1
P
Brake Current Limit
IN
2
Illustration 49: The mechanical brake opening logic
7.285 (ID 1544) Brake Mechanical Delay
Location in the menu: P3.14.2
Use this parameter to set the mechanical delay that is necessary to open the brake. After the brake opening command is given, the
speed stays at the value of the parameter P3.14.3 (Brake Opening Frequency Limit) until the brake mechanical delay is expired. Set
the delay time to agree with the reaction time of the mechanical brake.
224 | Danfoss A/S © 2021.09
Brake
Mech. Delay
4
3
2
1
AND
IN
1
IN
2
AND
IN
1
IN
2
OR
IN
1
IN
2
IN
3
5
6
7
5.
The output frequency of the drive follows the nor-
mal frequency reference.
6.
A Stop command is given.
7.
The mechanical brake becomes closed when the
output frequency goes below the close frequency
limit.
RS
SET
RESET
NOT
IN
OR
IN
1
IN
2
Parameter descriptions
I/O
MechanicBrake
I/O
MechanicBrakeInv
AB319735759636en-000101 / DPD01822
Advertisement
Table of Contents
