Omron MX2 Series User Manual page 319

(3) After outputting the brake release signal, the inverter waits for the brake confirma-
tion signal (C001 to C007 = 44: BOK) to turn ON during the time set in the Brake Error
Detection Time (b124).
If the brake confirmation signal does not turn ON within the time set in b124, the inverter
outputs the brake error signal (C021, C022, C026 = 20: BER) and detects the E36.
(Brake error).
If any of the Multi-function Input 1 to 7 Selection (C001 to C007) is set to 44 (BOK: Brake
confirmation), the Brake Error Detection Time (b124) setting is disabled and the inverter
proceeds to step (4) after outputting the brake release signal.
(4) After the brake confirmation signal turns ON (after releasing the brake), the inverter
waits until the Acceleration Wait Time on Brake Control (b122) elapses and acceler-
ates again to the set frequency.
If the amount of movement to the target position is small, it decelerates before the set fre-
quency is reached and makes a triangular movement.
⚫ During deceleration
(5) The Inverter starts decelerating the motor when it reaches the position short of the
target position by the amount equivalent to the sum of the amount of decelerating
movement caused by the deceleration time settings and the Creep Speed Moving
Amount (P014).
(6) When the frequency set in the Creep Speed Setting (P015) is reached during deceler-
ation, the inverter turns OFF the brake release signal (C021, C022, C026 = 19: BRK).
After turning OFF the brake release signal, the inverter waits for the brake confirmation sig-
nal (C001 to C007 = 44: BOK) to turn OFF during the time set in the Brake Error Detection
Time (b124).
If the brake confirmation signal does not turn OFF within the time set in b124, the inverter
outputs the brake error signal (C021, C022, C026 = 20: BER) and detects the E36.
(Brake error).
If any of the Multi-function Input 1 to 7 Selection (C001 to C007) is set to 44 (BOK: Brake
confirmation), the Brake Error Detection Time (b124) is disabled and the inverter proceeds
to step (7) after the brake release signal turns OFF.
(7) After the brake confirmation signal turns OFF (after forcing the brake), the inverter
waits until the Stop Wait Time on Brake Control (b123) or the time during which the
motor moves by the Creep Speed Moving Amount (P014), whichever is longer,
elapses and decelerates again to an output frequency of 0 Hz.
(8) After the motor stops, the output status of the inverter depends on the Brake Control
Function Selection (b120) setting.
The inverter switches to the DC injection braking mode when b120 is set to 01 (Enabled:
DC Injection Braking enabled during stop), and the DC injection braking mode is reset
when the RUN command turns OFF.
The inverter shuts off its output when b120 is set to 02 (Enabled: DC Injection Braking dis-
abled during stop).
Precautions for Correct Use
When the frequency set in the Creep Speed Setting (P015) is reached during deceleration, the
inverter turns OFF the brake release signal (C021, C022, C026 = 19: BRK) to force the brake,
which causes the motor to stop.
This means that the motor stops short of the actual target position, by the amount of the Creep
Speed Moving Amount (P014) at most.
Set the Creep Speed Moving Amount (P014) in consideration of the stopping accuracy.
Also, consider the Creep Speed Moving Amount (P014) when setting the Positioning Comple-
tion Range Setting (P017).
Multi-function Compact Inverter 3G3MX2-EV2 User's Manual (I666-E1)
6 Vector Control and Applied Functions
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