Brake Control Function - Omron SYSDRIVE MX2 SERIES User Manual

Brake Control Function

This function allows the Inverter to control the external brake of an elevating system.
When Brake Control Function 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 reaching to the release frequency, the Inverter outputs the brake release signal
(BRK) after the Brake Release Wait Time (b121) elapses. However, if the Inverter's output
current is less than the current value set in Brake 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) When Brake Confirmation (44: BOK) is set for a multi-function input terminal and a brake
release signal is output, the Inverter waits for a brake confirmation signal, without
accelerating, for the period set in Brake Wait Time for Confirmation (b124). 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 the 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 Break ON
Frequency (b127), and turns off the brake release signal (BRK).
(6) When Brake Confirmation (44: BOK) is set for a multi-function input terminal and the brake
release signal is turned OFF, the Inverter waits for the brake confirmation signal to turn OFF,
without decelerating, for the period set in Wait Time for Confirmation (b124). 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 Wait Time for Confirmation (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.
b125 Brake Release Frequency
Output frequency
RUN command
(FW input)
Brake release signal
(BOK input)
Brake confirmation signal
(BRK output)
Note: This operation chart applies to a case where the Brake confirmation (44: BOK) is selected for any
of Multi-function Input Selections (C001 to C007).
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.
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
(1)
(2)
b121 Brake Release Wait Time
(4)
b122 Brake Acceleration Wait Time
(3)
b124 Brake Wait Time for Confirmation
5-10 Brake Settings
Brake Wait Time for Confirmation
(7)
(5)
b123 Brake Stop Wait Time
(6)
b124 Brake Wait Time for Confirmation
5
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