Safe limited speed (sls) modes, Introduction, Safe limited speed (sls) mode – Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual User Manual
Page 75: Chapter 7, Introduction safe limited speed (sls) mode, Safe limited speed, Sls) modes, Chapter

Rockwell Automation Publication 750-RM001F-EN-P - February 2012
75
Chapter
7
Safe Limited Speed (SLS) Modes
Introduction
This chapter describes the Safe Limited Speed (SLS) modes of safety operation
and provides a list of configuration parameters along with wiring examples for
each mode.
Safe Limited Speed (SLS)
Mode
When properly configured for Safe Limited Speed, the safety option performs
Safe Limited Speed (SLS) monitoring functions in addition to the Safe Stop
function described in
. When the Safe Limited Speed
input (SLS_In) is OFF, feedback velocity is monitored and compared against a
configurable Safe Speed Limit.
If the feedback velocity is below the Safe Speed Limit during Safe Limited Speed
monitoring, the Door Control output (DC_Out) is unlocked after the P53
[LimSpd Mon Delay], if configured, has expired.
Topic
Page
Safe Limited Speed Parameter List
Safe Limited Speed Wiring Example
Safe Limited Speed with Door Monitoring Mode
SLS with Door Monitoring Parameter List
SLS with Door Monitoring Wiring Example
Safe Limited Speed with Enabling Switch Monitoring Mode
SLS with Enabling Switch Monitoring Parameter List
SLS with Enabling Switch Monitoring Wiring Example
Safe Limited Speed with Door Monitoring and Enabling Switch Monitoring Mode
SLS with Door Monitoring and Enabling Switch Monitoring Parameter List
SLS with Door Monitoring and Enabling Switch Monitoring Wiring Example
Safe Limited Speed Status Only Mode
SLS Status Only Parameter List
SLS Status Only Wiring Examples
ATTENTION: Make sure that an unlocked door does not result in a hazardous
situation.
If a Safe Stop Type is initiated or a fault occurs while the safety option is actively
monitoring Safe Limited Speed, door control remains unlocked. The safe state of
the SLS_In input may allow the door be unlocked.