Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Parameter Motor brake and stop operation
FR-A700 EC 6 - 261
6.13.5 Brake sequence function
(Pr. 278 to Pr. 285, Pr. 292)
This function is used to output from the inverter the mechanical brake operation timing signal in
vertical 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.
When exercising vector control with the FR-A7AP, this parameter changes to excessive
speed deviation detection frequency (For details, refer to section 6.3.6)
When Pr. 570 Multiple rating setting
≠
“2”, performing all parameter clear and inverter reset
changes the setting range. (Refer to section 6.7.5)
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
278
Brake opening frequency 3Hz 0–30Hz
Set to the rated slip frequency of the
motor + about 1.0Hz.
This parameter may be set only if
Pr. 278
≤
Pr. 282.
80
81
178–186
190–196
Motor capacity
Number of motor
poles
Input terminal
function selection
Output terminal
function selection 6.2.2
6.2.2
6.14.1
6.14.5
279
Brake opening current 130%
0–220%
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
0.3s 0–2s
Generally, set this parameter to about
0.1 to 0.3s.
281
Brake operation time at
start
0.3s 0–5s
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 0.2s
when Pr. 292 = 8.
282
Brake operation frequency 6Hz 0–30Hz
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 4Hz.
This parameter may be set only if Pr.
278
≤
Pr. 282.
283
Brake operation time at
stop
0.3s 0–5s
Set the mechanical delay time until the
brake is 0.1s when Pr. 292 = 7.
Sets the mechanical delay time until the
brake is 0.2 to 0.3s when
Pr. 292 = 8.
284
Deceleration detection
function selection
0
0 Deceleration is not detected.
1
If deceleration is not normal during
deceleration operation,the inverter
alarm is provided.
285
Overspeed detection fre-
quency
9999
0–30Hz
If (detected frequency) - (output fre-
quency) If (detected frequency) - (out-
put frequency)
>=
Pr. 285 during
encoder feedback control, the inverter
alarm (E.MB1) is provided.
9999 Overspeed is not detected
292
Automatic acceleration/
deceleration
9999
0 Normal operation mode
1/11
Shortest acceleration/deceleration mode
(Refer to page 6-209)
3
Optimum acceleration/deceleration
mode (Refer to page 6-210)
5/6 Elevator mode (Refer to section 6.9.3)
7 Brake sequence mode 1
8 Brake sequence mode 2
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless Vector Vector Vector