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Step
Operation
Initial status: The drive is in operation and the motor is running.
1
The user activates emergency stop with the emergency stop button [S61].
The emergency stop safety relay [A61] switches off the digital input on the digital I/O extension
module [A412.X] of the drive. This gives the emergency stop command.
The emergency stop safety relay [A61] switches off the power for the timer relay [K61].
2
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].
The relay output of the extension module [A412.X] re-energizes the timer relay [K61] resetting its
3
break delay counter. The relay keeps its delayed break contact closed.
Note: If the drive fails to acknowledge the reception of the emergency stop command in 2 seconds,
the main contactor opens and the system is tripped.
4
The drive decelerates the motor to zero speed in emergency stop deceleration time (parameter setting).
The break delay counter of the emergency stop safety relay [A61] trips and the delay contact switches
off the power for the extension safety relay [A62].
The extension safety relay [A62] switches off the power for the auxiliary safety relay [K21.1][K21.2]
5
and auxiliary relay [K63].
The auxiliary safety relay [K21.1] switches off the main contactor [Q2] and auxiliary safety relay [K21.2]
switches off the charging supply contactor [Q3].
The contact of the auxiliary relay [K63] energizes the emergency stop reset button indicator light
6
[S62].
Normal operation resumes after the user:
• releases the emergency stop button [S61] to normal (up) position
7
• resets the emergency stop circuit with the emergency stop reset button [S62] (the user must push
the button for 0.1 - 3 seconds)
• resets the drive (if the drive tripped on a fault).
Option description 17
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