Emerson Mentor MP Short Manual page 111

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
WARNING
mechanism could result in injury, independent protection devices of proven integrity must also be
incorporated.
The control terminal relay can be selected as an output to release a brake. If a drive is set up in this
manner and a drive replacement takes place, prior to programming the drive on initial power up, the
brake may be released. When drive terminals are programmed to non default settings the result of
incorrect or delayed programming must be considered. The use of a SMARTCARD in boot mode or
WARNING
an SM-Applications module can ensure drive parameters are immediately programmed to avoid this
situation.
Figure 8-16 Menu 12 Brake control function
Flux feedback
+
5.54
-
Flux present
12.52
threshold
Positive torque only
Current magnitude
4.01
Drive Active
10.02
Reference On
1.11
Speed feedback
3.02 +
-
Brake apply
12.45
speed
Key
Input
terminals
Output
terminals
Mentor MP Short Form Guide
Issue Number: 5
External brake
External field
released indicator
12.51
12.54
Field Active 12.50
12.53
+
-
Torque
present
12.43
Torque proving
threshold
Brake apply speed
12.46
delay
Read-write (RW)
0.XX
parameter
Read-only (RO)
0.XX
parameter
The parameters are all shown at their default settings
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Post brake
release delay
12.47
LATCH
Brake release source
12.55
LATCH
12.48
Brake apply delay
input
output
reset
LAT
1. If the reset input is 1 the output is 0
2. If the reset input is 0 the output latches at 1 if the input is 1
Brake release
action
12.49
Position control
mode
0
13.10=1
1
Jog override
(Menu 6)
2
Brake Release
12.40
Hold zero
6.08
speed
Brake controller
12.41
enable
111