183
PARAMETERS
4
<Setting>
(1) Parameter setting
1) Select advanced magnetic flux vector control. (Pr. 80, Pr. 81
≠ "9999")
2) Set "7 or 8" (brake sequence mode) in Pr. 60.
To ensure more complete sequence control, it is recommended to set "7" (brake opening completion signal
input) in Pr. 60. Note that the automatic restart after instantaneous power failure function is not activated
when the brake sequence mode is selected.
3) Refer to the following table and set the parameters:
* When vector control is executed with the FR-A5AP, this is replaced with excessive speed deviation
detection frequency. (Refer to the instruction manual of the FR-A5AP for details.)
Note: When using this function, set the acceleration time to 1s or longer.
(2) Explanations of terminals used
The terminals must be allocated using Pr. 180 to Pr. 186 and Pr. 190 to Pr. 195.
Parameter
Number
Name Setting Description
278
Brake opening
frequency
0 to 30Hz
Set to the rated slip frequency of the motor + about 1.0Hz.This parameter
may only be set if Pr. 278 ≤ Pr. 282.
279 Brake opening current 0 to 200%
Generally, set this parameter to about 50 to 90%. If the setting is too low,
the load is liable to drop with gravity at start.
Suppose that the rated inverter current is 100%.
280
Brake opening current
detection time
0 to 2 s Generally, set this parameter to about 0.1 to 0.3s.
281
Brake operation time
at start
0 to 5 s
Pr. 60 = 7: Set the mechanical delay time until the brake is loosened.
Pr. 60 = 8: Set the mechanical delay time until the brake is loosened +
about 0.1-0.2s.
282
Brake closing
frequency
0 to 30Hz
At this frequency, the brake opening request signal (BOF) is switched off.
Generally, set this parameter to the Pr. 278 setting + 3-4Hz.
This parameter may only be set if Pr. 282 Pr. 278.
283
Brake operation time
at stop
0 to 5 s
Pr. 60 = 7: Set the mechanical delay time until the brake is closed + 0.1s.
Pr. 60 = 8: Set the mechanical delay time until the brake is closed + about
0.2 to 0.3 s.
284
Deceleration detection
function selection
0 Deceleration is not detected.
1
If deceleration is not normal during deceleration operation, the inverter
alarm (E.MB2) is provided to shut off the output and switch off the brake
opening request signal (BOF).
285
Overspeed detection
frequency*
0 to 30Hz
If (detected frequency) - (output frequency) > Pr. 285 in the encoder
feedback control mode, the inverter alarm (E.MB1) is provided to shut off
the output and switch off the brake opening request signal (BOF).
9999 Overspeed is not detected.
Signal Terminals Used
Brake Sequence Mode
Pr. 60 = 7 (with mechanical brake
opening completion signal)
Pr. 60 = 8 (without mechanical brake
opening completion signal)
BOF According to Pr. 190 to Pr. 195 Brake opening request Brake opening request
BRI According to Pr. 180 to Pr. 186 Brake opening completion signal
Note: 1. The brake opening completion signal (BRI) is a parameter valid when Pr. 60 = 7.
2. When the terminal functions are changed using Pr. 180 to 186 and Pr. 190 to Pr. 195, the other
functions may be affected. Confirm the functions of the corresponding terminals before making
settings.
