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Rockwell Automation Publication 2094-RM002B-EN-P - May 2012 25

Safe Torque-off I/O Signals Chapter 3

Safe Stop Reset

Safe torque-off drives provide a Reset Input (RESET_IN) for resetting the drive

after a fault, and for synchronizing restart of several cascading drives. The Reset

Input (RESET_IN) is not safety certified and does not have dual-channel

capability. Automatic reset functionality, if needed, can be achieved by hard-

wiring the RESET_REF and RESET_IN terminals together.

The Safe-off Reset (SO Reset) is a reset from the Safe-off State to the active safe

monitor state. The reset is successful if the SS_In input is ON and no faults are

present. The SO Reset occurs after the SS_IN inputs have transitioned to ON

and RESET_IN is ON. After a successful SO Reset, RESET_IN may transition

to the OFF state.

When an SO Reset is requested, all diagnostic tests that can be performed prior

to outputs being energized are performed prior to a successful SO Reset. If a

diagnostic test can be performed only when outputs are energized, the test is

performed immediately following the SO Reset.

Faults

If a fault occurs, the SS_In inputs in use must turn OFF and ON again to reset

the GuardResetRequiredStatus bit before a successful SO Reset can occur.

ATTENTION: A reset of the Safe Stop function can result in machine operation.

ATTENTION: The Safe Stop Reset does not provide safety-related restart

according to EN 60204-1. Restart must be performed by external measures if

automatic restart could result in a hazardous situation. You are responsible for

determining whether automatic restart could pose a hazard.

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Centro Barbecue 6500 Safe use Specifiche Pagina 25