Brake Control Function - Omron RX Series User Manual

7 Detailed Functions

Brake Control Function

Use this function to control the external brake used in an elevating system etc. from the inverter.
The brake control function can be used independent of the 1st/2nd/3rd Control Method
(A044/A244/A344) selection. When the Brake Control Function Selection (b120) is set to 01 (Enabled),
the inverter operates as follows.
(1) When the RUN command is input, the inverter starts to output and accelerates to the Brake Release
Frequency (b125).
(2) After reaching the Brake Release Frequency, the inverter outputs the brake release signal (BRK)
when the Brake Release Wait Time (b121) elapses. However, if the output current of the inverter is
less than the Brake Release Current (b126), the inverter trips and outputs the brake error signal
(BER) instead of the brake release signal.
(3) If the brake confirmation signal (BOK) is allocated to a multi-function input terminal (if the
Multi-function Input S1 to S8 Selection (C001 to C008) is set to 44), after the brake release signal is
output, the inverter waits for the brake confirmation signal during the Brake Error Detection
Time(b124) without starting acceleration. If the brake confirmation signal does not turn ON within
the period set in b124, the inverter outputs the brake error signal (BER) and trips. If the brake
confirmation signal is not allocated to any multi-function input terminal, the Brake Error Detection
Time (b124) setting is disabled and the inverter proceeds to step (4) after the brake release signal is
output.
(4) After the brake confirmation signal is input (or after the brake release signal is output if BOK is not
selected), the inverter restarts acceleration up to the set frequency after the period set in the
Acceleration Wait Time on Brake Control (b122) elapses.
(5) After the RUN command is turned OFF, the inverter decelerates to the Break Force Frequency
(b127) and turns OFF the brake release signal (BRK).
(6) If the brake confirmation signal (BOK) is allocated to a multi-function input terminal (if the
Multi-function Input S1 to S8 Selection (C001 to C008) is set to 44), after the brake release signal
turns OFF, the inverter waits for the brake confirmation signal during the Brake Error Detection Time
(b124) without starting deceleration. If the brake confirmation signal does not turn OFF within the
period set in b124, the inverter outputs the brake error signal (BER) and trips. If the brake
confirmation signal is not allocated to any multi-function input terminal, the Brake Error Detection
Time (b124) setting is disabled and the inverter proceeds to step (7) after the brake release signal
turns OFF.
(7) After the brake confirmation signal turns OFF (or after the brake release signal turns OFF if BOK is
not selected), the inverter restarts deceleration down to 0 Hz after the period set in the Stop Wait
Time on Brake Control (b123) elapses.
b125 Brake release frequency
Output frequency
RUN command
Brake release signal
(BRK)
Brake confirmation
signal (BOK)
7 - 104
(1)
(2)
b121 Brake wait time for release
(4)
b122 Acceleration wait time
(3)
b124 Brake confirmation wait time
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
b127 Brake input frequency
(7)
(5)
b123 Brake wait time
for stopping
(6)
b124 Brake confirmation
wait time