Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 24)

24 Rockwell Automation Publication 750-RM001F-EN-P - February 2012
Chapter 2 About the PowerFlex Safe Speed Monitor Option Module
Safety Modes
Parameter 21 [Safety Mode] is used to configure the safety option to operate in
one of 11 user-selectable safety modes, based on combinations of the safety
functions listed on the previous page.
P21 Option Mode – Description Page
0 Disabled – In this mode, all safety functions are disabled. 25
1 Safe Stop – The safety option activates the configured Safe Stop Type upon deactivation
of the Safe Stop input or the occurrence of a Stop Category fault. 61
2 Safe Stop with Door Monitoring – In addition to monitoring for Safe Stop, the safety
option monitors the status of the door. 72
3 Safe Limited Speed – In addition to monitoring for Safe Stop, the safety option monitors
the feedback velocity and compares it to a configurable Safe Speed Limit. If the velocity
exceeds the limit, the safety option initiates the configured Safe Stop Type. 75
4 Safe Limited Speed with Door Monitoring – In addition to monitoring for Safe Stop
and Safe Limited Speed, the safety option monitors the status of the door. 81
5 Safe Limited Speed with Enabling Switch Control – In addition to monitoring for
Safe Stop and Safe Limited Speed, the safety option monitors the status of the Enabling
Switch input. 83
6 Safe Limited Speed with Door Monitor and Enabling Switch – In addition to
monitoring for Safe Stop and Safe Limited Speed, the safety option monitors the status of
the door and the Enabling Switch input. 86
7 Safe Limited Speed (status only) – In addition to monitoring for Safe Stop, the safety
option monitors the feedback velocity and compares it to a configurable Safe Speed Limit.
If the velocity exceeds the limit, the system status is made available as a safe output
intended for a safety programmable logic controller. No stopping action takes place. 91
8 Slave, Safe Stop – The safety option performs the same functions as Safe Stop. However,
it regards the Door Monitor input as a Door Control output from an upstream axis, and
performs a logical AND with its internal Door Control signal to form the cascaded Door
Control output. 98
9 Slave, Safe Limited Speed – The safety option performs the same functions as Safe
Limited Speed mode. However, it regards the Door Monitor input as a Door Control output
from an upstream axis, and performs a logical AND with its internal Door Control signal to
form the cascaded Door Control output. 104
10 Slave, Safe Limited Speed (status only) – The safety option performs the same
functions as Safe Limited Speed Status Only mode. However, it regards the Door Monitor
input as a Door Control output from an upstream axis, and performs a logical AND with its
internal Door Control signal to form the cascaded Door Control output. 107
IMPORTANT The Safe Speed Monitor option must be used with the 20-750-DENC-1 Dual
Incremental Encoder module of the 20-750-UFB-1 Universal Feedback module.