Mechanical Brake Control; Encoder Connection; Encoder Direction - Danfoss VLT AutomationDrive FC 300 Design Manual

Application Examples

8.10 Mechanical Brake Control

FC
+24 V 12
+24 V 13
D IN 18
D IN 19
COM 20
D IN 27
D IN 29
D IN 32
D IN 33
D IN
37
+10 V 50
A IN
53
A IN
54
COM
55
A OUT
42
COM
39
01
02
03
04
05
06
Table 8.14 Mechanical Brake Control
1-76
Current
Speed
1-71
Start (18)
Start
reversing (19)
Relay output
Open
Closed
Illustration 8.4 Mechanical Brake Control

8.11 Encoder Connection

Before setting up the encoder, the basic settings for a
closed loop speed control system is shown.
See also 9.3 Encoder Option MCB 102.
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
Parameters
Function Setting
5-40 Function [32] Mech.
Relay brake ctrl.
5-10 Terminal 18 [8] Start*
Digital Input
5-11 Terminal 19 [11] Start
Digital Input reversing
1-71 Start Delay 0.2
1-72 Start [5] VVC+/
Function FLUX
Clockwise
1-76 Start Im,n
Current
2-20 Release App.
Brake Current dependent
2-21 Activate Half of
Brake Speed nominal slip
[RPM] of the motor
*=Default Value
Notes/Comments:
Time
2-21
1-71 2-21
MG34S202 - Rev. 2013-08-19
12 13 18 19 27 29
24V or 10-30V encoder
Illustration 8.5 Encoder Connection to the Frequency
Converter
A
B
A
B
Illustration 8.6 24 V Incremental Encoder. Maximum Cable
Length 5 m

8.12 Encoder Direction

The direction of the encoder is determined by which order
the pulses are entering the frequency converter.
Clockwise (CW) direction means channel A is 90 electrical
degrees before channel B.
Counter Clockwise (CCW) direction means channel B is 90
electrical degrees before A.
The direction can be determined by looking into the shaft
end.
32 33 20 37
CW
CCW
223
8 8