Brake Sequence Function (Pr. 278 To Pr. 283, Pr. 292) - Mitsubishi Electric FR-E700 Instruction Manual
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Parameter
6.9.5
Brake sequence function (Pr. 278 to Pr. 283, Pr. 292)
This function is used to output from the inverter the mechanical brake operation timing signal in ver-
tical lift and other applications.This function prevents the load from dropping with gravity at a start
due to the operation timing error of the mechanical brake or an overcurrent alarm from occurring at
a stop, ensuring secure operation.
Pr. No. Name
278
Brake opening frequency
279
Brake opening current
Brake opening current detection
280
time
281
Brake operation time at start
282
Brake operation frequency
283
Brake operation time at stop
Automatic acceleration/
292
deceleration
The above parameters can be set when Pr. 160 "User group read selection" = 0.
FR-E700 SC EC/ENE
Setting
Initial Value
Description
Range
Set to the rated slip frequency of the motor + about
3 Hz
0–30 Hz
1.0 Hz.
This parameter may be set only if Pr. 278 Pr. 282.
Generally, set this parameter to about 50 to 90%. If
the setting is too low, the load is liable to drop due
130%
0–200%
to gravity at start.
Suppose that the rated inverter current is 100%.
0.3 s
0–2 s
Generally, set this parameter to about 0.1 to 0.3 s.
When Pr. 292 = 7, set the mechanical delay time
until the brake is loosened.
0.3 s
0–5 s
Set the mechanical delay time until the brake is
loosened + about 0.1 to 0.2 s when Pr. 292 = 8.
Set the frequency to activate the mechanical brake
by turning off the brake opening request signal
6 Hz
0–30 Hz
(BOF). Generally, set this parameter to the Pr. 278
setting + 3 to 4 Hz.
This parameter may be set only if Pr. 278 Pr. 282.
Set the mechanical delay time until the brake is
closed + 0.1 s when Pr. 292 = 7.
0.3 s
0–5 s
Sets the mechanical delay time until the brake is
closed + 0.2 to 0.3 s when Pr. 292 = 8.
0
Normal operation mode
Shortest acceleration/deceleration mode
1/11
(Refer to page 6-80.)
0
7
Brake sequence mode 1
8
Brake sequence mode 2
Motor brake and stop operation
AD MFVC
AD MFVC
AD MFVC
GP MFVC
GP MFVC
GP MFVC
Refer to
Parameters referred to
Section
80
Motor capacity
6.2.1
81
Number of motor poles
6.2.1
180–184
Input terminal function
6.10.1
selection
190–192
Output terminal
6.10.5
function selection
800
Control method
6.3.2
selection
6 - 111
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