Copley Controls Xenus Plus Series User Manual page 102

Xenus Plus User Guide
4.7.6: Example MTO Timing
Power
Reset/Start
E-Stop
K1, K2
K3, K4
t1
t2
t3
t4
Copley Controls
+24 VDC supplied to the safety relay
Momentary push-button that causes the K1~K2 relay contacts to close, supplying power
to the MTO inputs of the drive, and de-activating the MTO function.
This allows the drive to produce torque/force in the motor when it is enabled.
The latching push-button switch inputs to the safety relay. The HI level of this indicates
that the button has been released, opening the NC (Normally Closed) contacts.
These are instantaneous contacts in the relay. A HI level indicates that the contacts
are closed, supplying power to an Enable input of the drive to place it in an enabled state.
Relay contacts that will open after a pre-set time delay. This allows time for the drive
to remain in an enabled state while it performs a controlled deceleration that brings
the motor to a standstill before the MTO function is activated,
preventing any torque production in the motor.
Switch-on delay. If the E-Stop button is out, this is the delay after the Reset/Start button
is pressed in and the K1~K4 relay contacts close, deactivating the MTO function
and enabling the drive (1).
Delay-on de-energization. When the E-Stop button is pressed in (E-Stop),
this is the delay to the opening of the K1~K2 contacts which disables the drive,
initiating a controlled deceleration of the motor (2).
Waiting period. This is the time-delay that allows for the controlled deceleration
of the motor. When the E-Stop button is pressed in, this is the time delay to the
K3~K4 contact opening which will activate the MTO (3).
MTO response time. This is the time between the de-energizing of the drive
MTO inputs (K3~K4 contacts open) and the entry into the torque-off state.
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