Mitsubishi Electric FR-E700 Series Instruction Manual page 255

Parameter
Set the brake sequence mode
● Select advanced magnetic flux vector control or general-purpose magnetic flux vector control.
The brake sequence function is valid only when the external operation mode, external/PU
combined operation mode 1 or network operation mode is selected.
● Set "7 or 8" (brake sequence mode) in Pr. 292. To ensure more complete sequence control, it is
recommended to set "7" (brake opening completion signal input) in Pr. 292.
● Set "15" in any of Pr. 178 to Pr. 184 "Input terminal function selection" and assign the brake
opening completion signal (BRI) to the input terminal.
● Set "20 (positive logic)" or "120 (negative logic)" in any of Pr. 190 to Pr. 192 "Output terminal
function selection" and assign the brake opening request signal (BOF) to the output terminal.
b
CAUTION:
In lift applications where an inadvertent lifting of the holding brake can lead to personal injury
or property damage, the BOF signal may be used for safety reasons only in positive logic, that
is, setting "20".
With brake opening completion signal input (Pr. 292 = 7)
● When the start signal is input to the inverter, the inverter starts running. When the internal speed
command reaches the value set in Pr. 278 and the output current is not less than the value set in
Pr. 279, the inverter outputs the brake opening request signal (BOF) after the time set in Pr. 280
has elapsed.
When the time set in Pr. 281 elapses after the brake opening completion signal (BRI) was activated,
the inverter increases the output frequency to the set speed.
● When the inverter decelerates to the frequency set in Pr. 282 during deceleration, the inverter
turns OFF the BOF signal and decelerates further to the frequency set in Pr. 278. After electromag-
netic brake operation completes and inverter recognizes the turn OFF of BRI signal, the inverter
holds the frequency set in Pr. 278 for the time set in Pr. 283. And after the time set in Pr. 283 passes,
the inverter decelerates again. The inverter finally stops when its frequency reaches to Pr. 13
"Starting frequency setting" or 0.5Hz, whichever is lower.
Electromagnetic brake
Fig. 6-49: Operation when Pr. 292 = 7
FR-E700SC EC
Output
frequency
Pr. 280
Pr. 282
Pr. 278
Pr. 13
STF
Output currrent
BOF signal
BRI signal
operation
Closed
Pr. 281
ON
Pr. 279
ON
ON
Opened
Motor brake and stop operation
Pr. 13 setting or 0.5Hz,
whichever is lower
Time
Pr. 283
Closed
I001571E
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