Safe Torque Off
4-26
AC890PX AC Drive
To run the drive:
Ensure the STO Request contacts are closed.
Press the DRIVE START button.
To perform operational (not STO) stop:
Press the DRIVE STOP button.
Wait for the motor to come to rest.
To invoke STO:
Press the DRIVE STOP button.
Wait for the motor to come to rest.
Open the STO Request contacts simultaneously.
The contacts must remain open for the entire
duration that STO is required, they must not be
momentary action switches. The drive will confirm
via X11/05 that STO has been invoked by the lamp
being ON.
If the lamp is OFF, do not access the machine as a
fault may be present.
Note: if the STO Request contacts open while the
motor is rotating, the motor will coast to rest
(unless external forces act on it).
Minimum STO Implementation
This example shows the minimum connections required. To reset from STO requires that STO Request
contacts are closed to permit normal drive operation. The user must do a risk assessment to ensure that all
safety requirements are met. The user must select
and assess appropriate equipment.
Note: all wiring shown is within the control
cubicle.
X15/02 X15/03 X11/01 X11/03 X11/06 X14/03
DRIVE
START
DRIVE
STOP
STO
REQUEST
890 STO
X11/02 X11/04 X11/05 X14/04
24VDC
0V
Summary of Contents for AC890PX Series
Page 17: ...2 5 Product Overview AC890PX AC Drive 890PX bottom wire entry ...
Page 144: ...The Keypad 7 9 AC890PX AC Drive The Menu System Map ...
Page 145: ...7 10 The Keypad AC890PX AC Drive The Menu System Map continued ...
Page 328: ...Programming D 88 AC890PX AC Drive Functional Description ...
Page 386: ...Programming D 146 AC890PX AC Drive Setpoint Drive Frequency Frequency 1 Frequency 2 ...