1 BCN-C22005-697
FR-A800 Series
Instruction Manual Supplement
1 Brake sequence function
Setting the brake sequence operation
• Set "7 or 8" (brake sequence mode) in Pr.292 Automatic acceleration/deceleration. To ensure more complete
sequence control, it is recommended to set "7" (with brake opening completion signal input) in Pr.292.
• Set "15" in any of Pr.178 to Pr.189 (input terminal function selection), and assign the brake opening
completion (BRI) signal to the input terminal.
• Set "20 (positive logic) or 120 (negative logic)" in any of Pr.190 to Pr.196 (output terminal function selection),
and assign the brake opening request (BOF) signal to the output terminal.
• Use Pr.639 Brake opening current selection to select whether the output current or the motor torque is used as
a reference for the brake opening operation. (Under V/F control, the output current is used as a reference
regardless of the Pr.639 setting.)
• Under Real sensorless vector control, vector control, or PM sensorless vector control, use Pr.640 Brake
operation frequency selection to select whether the frequency command or the actual motor speed (estimated
value) is used as a reference for brake closing operation. If the brake operation timing is different from the motor
speed because of the load, set Pr.640 = "1 (brake operation with the actual motor speed (estimated value))".
• Under V/F control or Advanced magnetic flux vector control, perform brake operation while referring to the
frequency command regardless of the Pr.640 setting.
NOTE
• Under torque control, position control, or PM sensorless vector control (with the low-speed range high torque
characteristic disabled), the brake sequence function is disabled.
• For the details of the brake sequence function, refer to page 473 of the Instruction Manual (Detailed).
2 Swinging suppression control
Swinging suppression control operation (Pr.1073)
• Setting Pr.1073 Swinging suppression control operation selection = "1" enables swinging suppression
control. (Swinging suppression control is not available under zero speed or servo lock control.)
• During operation under swinging suppression control, the travel distance becomes longer. Input a stop command
earlier to avoid a collision with an obstacle.
• A deceleration to stop without swinging suppression control is applied for stopping as a result of PU stop, an
emergency stop command input from a communication option, Pr.875 Fault definition, or an emergency stop
input (X92).
NOTE
• Under torque control or position control, the swinging suppression control is disabled.
• During operation of the power failure time deceleration-to-stop function, or when the automatic restart after
instantaneous power failure is enabled (Pr.57 "9999"), the swinging suppression control is disabled.
• For the details of the swinging suppression control, refer to page 486 of the Instruction Manual (Detailed).
3 Plug-in option compatibility
FR-A8AZ
• "36 (torque monitor (power driving/regenerative driving polarity switching))" or "46 (motor temperature)" can be
set in the monitor selection parameters (Pr.52, Pr.54, Pr.158, Pr.774 to Pr.776, and Pr.992).
• The brake sequence function is available under V/F control.
• The swinging suppression control function is available under V/F control and Advanced magnetic flux vector
control.
• The plug-in option FR-A8AZ and FR-A8APR are supported.
BCN-C22005-697.fm 1 ページ ２０１５年１月８日 木曜日 午後８時３７分
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