Johnson Controls VFD67 Series, Getting Started Manual, Page: 37 / 52

VFD67 Size A to D Getting Started Guide
37
Issue Number: 1 www.johnsoncontrols.com
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Defines the brake release and brake apply frequencies.
If the current is >Pr
46 and the frequency is > Pr 48 , the brake release sequence is
started.
If the frequency is <Pr
49 and the drive has been commanded to stop, the brake is
applied immediately.
Defines the time between the frequency and load condition being met and the brake
being released. The ramp is held during this time.
Defines the time between the brake being released and the ramp hold being released.
Figure 6-12 Brake function diagram
No Function Range Defaults Type
48 Brake release frequency
0.0 to 20.0 Hz
1.0
RW
49 Brake apply frequency 2.0
No Function Range Defaults Type
50 Pre-brake release delay 0.0 to 25.0 s 1.0 RW
No Function Range Defaults Type
51 Post brake release delay 0.0 to 25.0 s 1.0 RW
Current
magnitude
Brake release
current threshold
Brake apply
current threshold
46
47
+
_
Motor
frequency
Brake release
frequency
Brake apply
frequency
48
49
+
_
+
_
Reference
enabled
Latch
Drive
active
In Out
Reset
Pre-brake
release
delay
50
Post brake
release
delay
51
Brake
release
Brake
controller
enable
12
T5
T6
B3
User
programmable
Brake
disabled
Ramp
hold
88
85
91