User guide

96 Unidrive SP Short Form Guide
www.controltechniques.com Issue Number: 2
Figure 9-20 Closed-loop brake function
The brake control functions are provided to allow well co-ordinated operation of an
external brake with the drive. While both hardware and software are designed to high
standards of quality and robustness, they are not intended for use as safety functions,
i.e. where a fault or failure would result in a risk of injury. In any application where the
incorrect operation of the brake release mechanism could result in injury, independent
protection devices of proven integrity must also be incorporated.
WARNING
4.01
Current
magnitude
Lower current
threshold
12.43
+
_
3.02
Speed
feedback
Brake apply
speed
12.45
+
_
Post-brake
release delay
0.XX
0.XX
Key
Read-write
(RW)
parameter
Read-only (RO)
parameter
Input
terminals
Output
terminals
LAT
input
reset
output
If the reset input is 1, the output is 0.
If the reset input is 0, the output latches
at 1 if the input is 1.
i
r
o
+
_
Motor flux
7/8 x Rated flux
1.11
Reference
on
LAT
i
o
r
OR
Brake apply
speed delay
12.46
10.02
Drive active
12.47
12.40
Brake
release
2.03
6.08
Hold zero
speed
Ramp
hold
Brake
controller
enable
12.41
8.12
8.17
8.22
8.27
8.32
T25 digital
I/O 2 invert
Relay source
invert
T25 digital I/O 2
source / destination
Relay source
T25 digital I/O 2
output select
12.48
Brake apply
delay
10.02
Drive active
1
Enable position
controller during
brake release
12.49
13.10
Position
control
mode
( = 1)
Closed-loop
vector = 0
Servo = 1
1