Omron SYSDRIVE RX Series User Manual page 183

(6) If the brake confirmation signal (BOK) is allocated to a multi-function input (when "44" is set in
any of C001 to C008), the Inverter waits for the brake confirmation signal to be turned off for the
period set in brake confirmation wait time b124 without decelerating, after the brake release
signal is turned off. If the brake confirmation signal is not turned off within the period set in b124,
the Inverter outputs the brake error signal (BER), resulting in trip. If the brake confirmation signal
is not allocated to a multi-function input, brake confirmation wait time b124 is disabled, and the
Inverter performs processing (7) after the brake release signal is turned off.
(7) After the brake confirmation signal is turned off (or after the brake release signal is turned off if
BOK is not selected), the Inverter restarts deceleration down to 0 Hz after the period set in stop
wait time b123 elapses.
b0125 Brake release
frequency
Output frequency
(1)
(2) b121 Brake wait time
RUN command
Brake release signal
Brake confirmation signal
Note: The above operation chart applies to a case where the brake confirmation signal (44: BOK)
is selected for any of multi-function inputs 1 to 8 (C001 to C008). If BOK is not selected, the
acceleration wait time (b122) starts at the brake release signal ON timing. The stop wait time
(b123) starts at the brake release signal OFF timing.
•To use the brake control function, allocate the following functions to multi-function I/O terminals,
as required.
•To input a brake release signal from an external brake to the Inverter, allocate the brake
confirmation signal (44: BOK) to any of multi-function inputs 1 to 8 (C001 to C008).
•Allocate the brake release signal (19: BRK) to any of multi-function output terminals P1 to P5
(C021 to C025). Also, to use a brake error output signal, allocate the brake error signal (20:
BER).
•To use the brake control function, you are recommended to select "sensorless vector control"
(A044 = 03), "0-Hz sensorless vector control" (A044 = 04), or "sensor vector control" (A044 = 05)
so that the Inverter outputs high torque during startup. (Refer to page 4-21.)
for release
(4) b122 Acceleration wait time
(3)
b124 Brake confirmation wait time
4-2 Function Mode
b127 Brake input
frequency
(7)
(5)
b123 Brake wait time
for stopping
(6)
b124 Brake confirmation wait time
4
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