"Automatic" brake mode (automatic operation)
In automatic operation, the inverter automatically released the holding brake when the motor is started. In the stopped state, the holding brake is closed.
DANGER!Manual release of the holding brake
In automatic operation, a manual release of the holding brake is also possible. The manually triggered "Release holding brake" command has a direct impact on the "Release holding brake [115]" trigger. Thus, the holding brake can be manually released if the power section is switched off.
Possible consequences: Death, severe injuries or damage to property
▶
The responsibility for a manual release of the holding brake has the external trigger source for the "Release holding brake" command!
General mode of operation
The following diagram demonstrates the general functioning of the automatic operation:
|
|
|
|
①
|
If the inverter is enabled and no error is active, the motor can be started with the "Run" function in forward rotating direction.
The power section is switched on and the motor is magnetized first.
|
|
②
|
The holding brake is released. In this case, the output trigger "Release holding brake [115]" is set to TRUE. This trigger must be assigned to a digital output or, in the simplest case, to the relay which then switches the brake supply.
|
|
③
|
After the release time 0x2820:003 (P712.03) has elapsed, the motor is accelerated to the setpoint.
In 0x2820:015 (P712.15), the brake status "Brake released [1]" is displayed.
|
|
④
|
If "Run" is set to FALSE, the motor is stopped with the stop method set in 0x2838:003 (P203.03). In the example: Stop with standard ramp.
|
|
⑤
|
Then the holding brake is closed again.
|
|
⑥
|
After the closing time 0x2820:002 (P712.02) has elapsed, the brake status "Brake closed [0]" is displayed in 0x2820:015 (P712.15).
|
If the power section is disabled, the holding brake is closed. Reasons for this can be an error, a fault, or the activation of the "Safe torque off (STO)" safety function.