Unidrive M400 User Guide
145
Issue Number: 2
Figure 11-22 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
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
an NV media card in boot mode can ensure drive parameters are immediately programmed to avoid this situation.
WARNING
mm.ppp
mm.ppp
Key
Read-write (RW)
parameter
Read-only (RO)
parameter
Input
terminals
Output
terminals
The parameters are all shown in their default settings
05.034
12.040
04.001
10.002
01.011
05.001
03.002
Percentage
flux
OL mode
RFC-A
Mode
Flux and
Current
Detection
Current
magnitude
Output
Frequency
Drive Active
Estimated
Frequency
Reference On
BC Lower Current
Threshold
(
)
12.043
BC Brake Delay
(
)
12.046
Frequency
Detection
BC Brake
Release
Post-brake Release
Delay
(
)
12.047
90%
+
_
+
_
+
_
+
_
+
_
BC Lower Current Threshold
(
)
12.043
BC Upper Current Threshold
(
)
12.042
Hysteriesis
Latch
Latch
Modulus
OL mode
or RFC-A
mode
BC Brake Release
Frequency
(
)
12.044
BC Brake Apply
Frequency
(
)
12.045
BC Brake Apply
Through Zero
Threshold
(
)
12.051
Ramp Hold
(
)
02.003
Hold Zero
Frequency
(
)
06.008
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