(A) Application parameters
PARAMETERS
473
5
GROUP
A
5.14.3 Brake sequence function
This function outputs operation timing signals of the mechanical brake from the inverter, such as for lift applications.
This function is useful in preventing load slippage at a start due to poor mechanical brake timing and overcurrent alarm
in stop status and enable secure operation.
Pr. Name
Initial
value
Setting
range
Description
278
A100
Brake opening frequency
3 Hz 0 to 30 Hz
Set the rated slip frequency of the motor + approx. 1.0 Hz.
This can be set only when Pr.278 Pr.282.
279
A101
Brake opening current
130% 0 to 400%
If the setting is too low, dropping of the load is more likely to
occur at a start, and generally, it is set between 50 and
90%.
The rated inverter current is regarded as 100%.
280
A102
Brake opening current
detection time
0.3 s 0 to 2 s Generally set between 0.1 and 0.3 s.
281
A103
Brake operation time at
start
0.3 s 0 to 5 s
Set the mechanical delay time until braking eases.
When Pr.292 = "8" set the mechanical delay time until
braking eases + approx. 0.1 to 0.2 s.
282
A104
Brake operation frequency
6 Hz 0 to 30 Hz
Turn OFF the brake opening request signal (BOF) and set
the frequency for operating the electromagnetic brake.
Generally, set the setting value of Pr.278 + 3 to 4 Hz.
This can be set only when Pr.282 Pr.278.
283
A105
Brake operation time at
stop
0.3 s 0 to 5 s
When Pr.292 = "7" set the mechanical delay time until the
brake closes + 0.1 s.
When Pr.292 = "8" set the mechanical delay time until the
brake closes + approx. 0.2 to 0.3 s.
284
A106
Deceleration detection
function selection
0
0 The deceleration detection function disabled.
1
The protective function activates when the deceleration
speed of the deceleration operation is not normal.
285
A107
Overspeed detection
frequency
9999
0 to 30 Hz
The brake sequence fault (E.MB1) activates when the
difference between the detection frequency and output
frequency is equal to or greater than the setting value under
encoder feedback control.
9999 Overspeed detection disabled.
292
F500
Automatic acceleration/
deceleration
0
0 Normal operation
1, 11
Operation with the shortest acceleration/deceleration
time.(Refer to page 300.)
3
Operation with the optimum acceleration/deceleration
time.(Refer to page 300.)
5, 6 Lift operation 1, 2. (Refer to page 303.)
7 Brake sequence mode 1
8 Brake sequence mode 2
639
A108
Brake opening current
selection
0
0 Brake opening by output current
1 Brake opening by motor torque
640
A109
Brake operation frequency
selection
0
0 Brake closing operation by frequency command
1
Brake closing operation by the actual motor rotation speed
(estimated value)
641
A130
Second brake sequence
operation selection
0
0 Normal operation when the RT signal is ON
7 Second brake sequence 1 when the RT signal is ON
8 Second brake sequence 2 when the RT signal is ON
9999 First brake sequence 1 is valid when the RT signal is ON
Magnetic flux
Magnetic flux
Sensorless
Sensorless
Vector
Vector
PM
PM
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