Emerson Unidrive M400 Series User Manual page 124

Safety Product Mechanical
information information installation
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
Figure 11-26 Open loop brake function
Current
Magnitude
04.001
Brake Control:
Lower Current
12.043
Threshold
Hysteresis
Brake Control:
Brake Control:
Upper Current
Lower Current
_
Threshold
Threshold
12.042 12.043
Output
Frequency
05.001
Brake Control:
Brake Release
Frequency
12.044
Brake Control:
Brake Apply
Frequency
12.045
Reference
On
01.011
Figure 11-27 Brake sequence
Pr 12.044 Brake Control:
Brake Release Frequency
Pr 12.042 Brake Control:
Upper Current Threshold
1 2 3
Pr 12.046 Pr 12.047
124
Electrical Getting Basic
installation started parameters
+
_
Drive
Active
10.002
+
_
+
_
x(-1)
+
_
12.051
Brake Control:
Brake Apply Through
Zero Threshold
Pr 12.045 Brake Control:
Brake Apply Frequency
4 5 6
Running NV Media Card
Optimization
the motor Operation
Input
X
X
terminals
X
Output
X
terminals
The parameters are all shown in their default settings
o
I
LAT
12.041
r
Brake Control:
Enable
Pr 05.001 Output Frequency
Pr 04.001 Current Magnitude
1. Wait for upper current threshold and brake release frequency
2. Pre-brake release delay
Pr 10.002 Drive Active
3. Post-brake release delay
4. Wait for brake apply frequency
5. Wait for zero frequency
Pr 01.011 Reference On
6. 1s delay as phase 2 of stopping sequence (Pr
Pr 12.040 Brake Control:
Brake Release
Pr 02.003 Ramp Hold
Onboard Advanced
Diagnostics
PLC parameters
Key
Read-write (RW)
mm.ppp
parameter
Read-only (RO)
mm.ppp
parameter
Brake Control:
Brake Delay
12.046
12.047
Brake Control:
Brake Control:
Post-Brake
Release
Release
Delay
Brake Control:
12.050
Initial Direction
Force Reference
01 57 .0
Direction
input output
i o
LAT
reset
r
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.
06.001
Unidrive M400 Control User Guide
Issue Number: 1
UL
information
Ramp
Hold
02.003
12.040
Brake
=1,2 or 3)