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198 Unidrive M702 User Guide
Issue Number: 3
Figure 11-28 RFC-A mode with brake controller mode (12.052) =1
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.
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 NV media card in boot mode or an SI-Applications module can ensure drive parameters are immediately programmed to avoid this situation.
04.001
Current
Magnitude
Brake Control:
Lower Current
Threshold
12.043
03.001
Final Speed
Reference
Brake Control
Brake Release
Speed
12.044
+
_
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
+
_
LAT
i
o
r
10.002
Drive active
05.034
Percentage
Flux
90%
OR
+
_
x(-1)
Post-Brake
Release Delay
12.047
12.040
Brake Control:
Brake Release
02.003
Ramp
Hold
12.046
Brake Control:
Brake Delay
Brake Control
Brake Apply
Speed
12.045
LAT
i
o
r
+
_
01.011
x(-1)
+
_
Brake Control
Brake Apply
Zero Threshold
12.051
12.041
Brake Control:
Enable
Reference
On
mm.ppp
mm.ppp
Key
Read-write (RW)
parameter
Read-only (RO)
parameter
Input
terminals
Output
terminals
X
X
X
X
The parameters are all shown in their default settings
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