Mitsubishi Electric FR-E720-600 Instruction Manual page 130

Motor brake and stop operation
(1) 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.
(2) 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 speed has decreased to the frequency set in Pr. 282 during deceleration, the BOF signal is turned off. When the
time set in Pr. 283 elapses after the electromagnetic brake operation was completed and the BRI signal was turned off, the
inverter output is switched off.
Brake opening request
(BOF signal)
Brake opening completion
(BRI signal)
Electromagnetic brake operation
128
Target
frequency
Pr. 280
Pr. 282
Pr. 278
Pr. 13
STF
Output I
Closed
Pr. 281
ON
Pr. 279
ON
ON
Opened
Time
Pr. 283
Closed