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Rockwell Automation B Series User Manual

Rockwell Automation B Series
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240 Rockwell Automation Publication 520-UM001I-EN-E - July 2016
Appendix G Safe-Torque-Off Function
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.
Verify Operation
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 page 236
.
Verify that both safety channels are functioning according to the table below.
Discrepancy Time of the Safety Inputs
For example, if S1 is disabled and S2 did not follow after the discrepancy time,
fault F111 “Safety Hardware” will occur. However, if S1 is disable and S2 follows
before the discrepancy time, fault F059 “Safety Open” will occur.
The discrepancy time is one second for PowerFlex 525 FRN 5.xxx and later. The
discrepancy time is 10 milliseconds for PowerFlex 525 FRN 4.xxx and earlier.
By itself, the Safe-Torque-Off function initiates a coast to stop action.
Additional protective measures will need to be applied when an application
requires a change to the stop action.
Channel Operation and Verification
Safety Function
Status
Drive In
Safe State
Drive In
Safe State
Drive In
Safe State
Drive
Able To Run
Drive Status Configured by t105
[Safety Open En]
Fault F111
(Safety Hardware)
Fault F111
(Safety Hardware)
Ready/Run
Safety Channel Operation
Safety Input S1 No Power Applied Power Applied No Power Applied Power Applied
Safety Input S2 No Power Applied No Power Applied Power Applied Power Applied
If an external fault is present on the wiring or circuitry controlling the Safety 1
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.

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Rockwell Automation B Series Specifications

General IconGeneral
BrandRockwell Automation
ModelB Series
CategoryIndustrial Equipment
LanguageEnglish

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