Verify Operation - Allen-Bradley PowerFlex 525 User Manual

Appendix G Safe-Torque-Off Function

Verify Operation

212
Under normal drive operation, both safety inputs (Safety 1 and Safety 2) are
energized, and the drive is able to run. If either input is de-energized, the gate
control circuit becomes disabled. To meet EN ISO 13849 operation, both safety
channels must be de-energized. Refer to the following examples for more
information.
By itself, the Safe-Torque-Off function initiates a coast to stop action.
IMPORTANT
Additional protective measures will need to be applied when an application
requires a change to the stop action.
Test the safety function for proper operation after the initial setup of the
PowerFlex 525 Safe-Torque-Off function. Retest the safety function at the
intervals determined by the safety analysis described on
Verify that both safety channels are functioning according to the table below.
Channel Operation and Verification
Safety Function Drive In
Status Safe State
Drive Status Configured by t105
[Safety Open En]
Safety Input S1 No Power Applied
Safety Input S2 No Power Applied
If an external fault is present on the wiring or circuitry controlling the Safety 1
IMPORTANT
or Safety 2 inputs for a period of time, the Safe-Torque-Off function may not
detect this condition. When the external fault condition is removed the Safe-
Torque-Off function will allow an enable condition. Fault in the external wiring
shall either be detected by external logic, or excluded (wiring must be
protected by cable ducting or armoring), according to EN ISO 13849-2.
Rockwell Automation Publication 520-UM001A-EN-E - February 2013
page
Drive In Drive In
Safe State Safe State
Fault F111 Fault F111
(Safety Hardware) (Safety Hardware)
Safety Channel Operation
Power Applied No Power Applied
No Power Applied Power Applied
208.
Drive
Able To Run
Ready/Run
Power Applied
Power Applied