Fuji Electric FRENIC-Ace series, Руководство пользователя

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5.3 Description of Function Codes
5-215
FU
NCT
IO
N
C
O
DE
S
Chap 5
Applying the brake
When the run command is OFF and the output frequency drops below the level specified by J71 (Brake control
signal (Brake-applied frequency/speed)) and stays below the level for the period specified by J72 (Brake control
signal (Brake-applied timer)), the inverter judges that the motor rotation is below a certain level and turns the signal
“BRKS” OFF for activating (applying) the brake.
This operation reduces the load applied to the brake, extending lifetime of the brake.
Function code Name Data setting range Remarks
J71 Brake-apply
frequency/speed
0.0 to 25.0 Hz
J72 Brake-apply timer 0.00 to 5.00s
J96 Brake-apply
conditions (Only
available when
using vector control
with speed sensor)
0 to 31 (in decimal)
Criteria of speed condition for
Brake-apply (Bit 0)
0: Detected speed (default)
1: Reference speed
Specifies the criteria of speed to be
used for Brake-apply condition.
Condition of brake-apply
control signal (Bit 4)
0: Regardless of run
command status (ON or
OFF) (default)
1: Only when run command is
OFF.”
Specifies whether to turn off a brake
control signal independent of a run
command ON/OFF or only when a
run command is OFF.
When forward and reverse
operations are switched,
Brake-applied conditions may be
met in the vicinity of zero speed. For
such a case, select “Only when a
run command is OFF” (Bit 4 = 1).
Note: Resolution of each function code is different from the FRENIC-MEGA and FRENIC-Multi.
Figure 5.3-15 Time chart
• The brake control signal applies by default to the 1st motor. When the 2nd motor is selected, switch
the brake control signal to this motor by setting the corresponding bit of function code A98.
• When the inverter is shut down due to an alarm status or coast-to-stop command, the brake control
signal is immediately applied.
• The stop is determined after the output frequency exceeds “F25 stop fre E30 frequency
arrival hysteresis width”, and then the output frequency falls below F25.
To inch the motor (repeatedly turn ON and OFF the run command in a short time), adjust F25 and
E30.
速度指令/検出
ブレーキ信号
『BRKS』
OFF
J71:投入周波数
ON
J72:投入タイマ*
F25:停止周波数
F39:停止周波数
継続時間
*タイマカウント中にインバータの出力がOFFした場合，
J72のタイマは無視され，ブレーキが投入されます。
Speed
command/detection
J71: Brake-apply frequency
F25: Stop frequency
Brake signal BRKS
Brake control signal
"BRKS"
J72 Brake-apply Timer*
F39: Stop frequency
holding time
* If inverter output was turned off before the timer counts up, then the brake is applied.