OperationStep
Initial status: The drive is in operation and the motor is running.
The user activates emergency stop with the emergency stop button [S61].1
The emergency stop safety relay [A61] de-energizes the digital input on the digital I/O extension
module [A412.X] of the drive. This gives the emergency stop command to the drive.
2
The emergency stop safety relay [A61] de-energizes the timer relay [K61].
The break delay counter of the emergency stop safety relay [A61] starts (user-adjustable delay).
The break delay counter of the timer relay [K61] starts (non-user-adjustable delay).
The drive acknowledges the reception of the emergency stop command by energizing the relay output
(RO1) of the digital I/O extension module [A412.X].
3
The relay output of the extension module [A412.X] energizes the timer relay [K61], resetting its break
delay counter. The relay keeps its delayed break contact closed.
Note: If the drive does not acknowledge the reception of the emergency stop command in 2 seconds,
the main contactor opens and the system is tripped.
The drive decelerates the motor to zero speed in emergency stop deceleration time (user-defined
parameter).
4
The break delay counter of the emergency stop safety relay [A61] trips and the delay contact de-en-
ergizes the extension safety relay [A62].
5
The extension safety relay [A62] de-energizes XSTO inputs IN1 and IN2 of the inverter control unit
[A41], which activates the Safe torque off function.
The extension safety relay [A62] de-energizes safety relays [K21.1], [K21.2], and [K63].
The safety relay [K21.1] opens the main contactor [Q2], and safety relay [K21.2] opens the charging
supply contactor [Q3].
The main contactor [Q2] and charging supply contactor [Q3] disconnect the power supply from the
drive module [T1].
The contact of the safety relay [K63] energizes the emergency stop reset button indicator light [S62].6
Normal operation resumes after the user:
7
• releases the emergency stop button [S61] to normal (up) position
• pushes the emergency stop reset button [S62] for 0.1 … 3 seconds to reset the emergency stop
circuit
• resets the drive (if the drive tripped on a fault).
Option description 21
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