Mitsubishi Electric fr-e700 series, Инструкция по эксплуатации

Страница: 265 / 608

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