Safe torque off without standstill checking – Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual User Manual
Page 64
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Rockwell Automation Publication 750-RM001F-EN-P - February 2012
Chapter 6
Safe Stop and Safe Stop with Door Monitoring Modes
Figure 13 - Timing Diagram for Safe Stop 2
(1) This signal is internal, between the safety option and drive.
(2) DC_Out output shown configured as Power to Release. See
for more information.
Safe Torque Off without Standstill Checking
When Safe Torque Off without Standstill Checking is initiated, motion power is
removed immediately and the configured Stop Delay P47 [Max Stop Time]
begins. Door control logic is set to Unlock when the Stop Delay P47 [Max Stop
Time] expires, regardless of speed.
Figure 14 - Timing Diagram for Safe Torque Off without Standstill Checking
(1) This signal is internal, between the safety option and drive.
(2) DC_Out output shown configured as Power to Release. See
for more information.
SS_Out Output
SS_In Input
Stop Request
Stop Delay: P47
Standstill Position and Standstill
Speed Monitoring
(drive remains enabled)
P51 [Stop Decel Tol]
P48 [Standstill Speed]
Speed
Stop Monitoring Delay:
P46
Time
Motion Power
(1)
Stop Command
(1)
DC_Out Output
(2)
Stop Request
Stop Delay: P47
Safe Torque-off
Active
Door Control
Output Unlock
Time
SS_Out Output
SS_In Input
Speed
Motion Power
(1)
Stop Command
(1)
DC_Out Output
(2)
TIP
All Stop Types require an encoder to be connected.