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8 PARAMETER FUNCTIONS
8-9
8
8.5.3 Selection of regenerative brake unit
Pr. 30 "regenerative brake option selection"
Pr. 70 "regenerative brake duty"
Pr. Setting Range Unit
30 0, 1
70 0.0 to 15.0 %
Set Pr. 30 and Pr. 70 according to the regenerative brake unit used. At the
setting of Pr. 30 = 0, the Pr. 70 "regenerative brake duty" value is fixed at 3% and
Pr. 70 cannot be read.
When Pr. 30 = 1, set the value given in the following table since Pr. 70 setting is
enabled.
Regenerative Brake Option Pr. 30 Pr. 70
MRS brake resistor (option) 0
BU-
brake unit (option) 0
FR-ABR-
high-duty brake resistor (option) 1 10
CAUTION
Do not set the Pr. 70 value which exceeds the setting of the brake
resistor used. Doing so will overheat the brake resistor.
8.5.4 Stall prevention operation level
Pr. 22 "stall prevention operation level"
Setting Range Unit Remarks
0, 60.0 to 200.0 % When 0 is set, the stall prevention function is not activated.
When the output current reaches the Pr. 22 setting, the speed is varied with the
running status to suppress the torque. The setting is based on the rated motor
current.
When the stall prevention function is activated, OL appears on the screen of the
FR-PU04 parameter unit. That the stall prevention function has been activated
can be exported as OL signal from the terminal.
Refer to: 8.7.2 Selection of the control circuit
output terminal functions
MEMO
If the stall prevention function is activated during acceleration or
deceleration, the acceleration or deceleration time [Section 8.5.2]
will be longer than the setting. When the travel of a machine or the
like is determined by the acceleration or deceleration time, the travel
will increase due to the operation of the stall prevention function.
If the stall prevention function is activated during constant speed
operation, the running speed may vary abruptly.