Parker ac890 - Page 171

6-36 Safe Torque Off
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
Channel A Check:
STO test
Comprehensive Check, Activity
Expected reaction and effect
6
With drive running and motor turning, momentarily disconnect
terminal X11/01 (maximum duration of disconnect = 1 second),
while retaining +24V at terminal X11/03.
Motor must immediately coast to rest.
Drive must report STO trip immediately.
X11/05 and /06 must remain OFF.
7
Ensure terminals X11/01 and X11/03 are both 24V. Try to restart
the drive.
Drive must restart at SPT1.
STO trip must clear.
X11/05 and /06 must remain OFF.
Channel B Check:
STO test
Comprehensive Check, Activity
Expected reaction and effect
8
With drive running and motor turning, momentarily disconnect
terminal X11/03 (maximum duration of disconnect = 1 second),
while retaining +24V at terminal X11/01.
Motor must immediately coast to rest.
Drive must report STO trip immediately.
X11/05 and /06 must remain OFF.
9
Ensure terminals X11/01 and X11/03 are both 24V. Try to restart
the drive.
Drive must restart at SPT1.
STO trip must clear.
X11/05 and /06 must remain OFF.