Brake Control Function - Omron 3G3RX User Manual

Brake Control Function

•This function allows the Inverter to control the external brake of equipment, including an elevating
system. When brake control selection b120 is set to "01" (enabled), the Inverter operates as
follows:
(1) At RUN command input, the Inverter starts output, and accelerates to the release frequency.
(2) After the release frequency is reached, the Inverter outputs the brake release signal (BRK) after
the brake release establishment wait time (b121) elapses. However, if the Inverter's output
current is less than the current value set in release current b126, the Inverter does not output
the brake release signal. In this case, the Inverter trips, and outputs the brake error signal (BER).
(3) 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 for the period set in
brake confirmation wait time b124 without accelerating, after the brake release signal is output.
If the brake confirmation signal does not turn on 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 (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 a set frequency after the period set in
acceleration wait time b122 elapses.
(5) After the RUN command is turned off, the Inverter decelerates to the brake release frequency
(b125), and turns off the brake release signal (BRK).
(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)
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).
(2)
b121 Brake wait
time for release
(4) b122 Acceleration wait time
b124 Brake confirmation
(3)
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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