Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 114)

114 Rockwell Automation Publication 750-RM001F-EN-P - February 2012
Chapter 9 Safe Maximum Speed and Direction Monitoring
You define the Safe Stop Type initiated by the safety option in the event of an
SMS Speed fault by using the P63 [Max Spd Stop Typ] parameter.
If an SMS Speed fault is detected during a Stop Monitoring Delay, P46 [Stop
Mon Delay], the delay ends immediately and the configured Stop Delay P47
[Max Stop Time] begins.
Figure 38 - SMS Speed Fault During Stop Monitoring Delay
If an SMS Speed fault is detected during the Stop Delay [Max Stop Time], and
the P63 [Max Spd Stop Typ] parameter equals Use Configured Stop Type (Safe
Stp Typ), and the feedback signals indicate less than maximum frequency
(1)
for
your encoder type, the fault is reported, but no further action is taken.
Deceleration monitoring performs the safety function during the Stop Delay P47
[Max Stop Time]. That is, if an SMS Speed fault occurs during the Stop Delay
P47 [Max Stop Time], the fault is ignored and the stopping action continues.
P63 [Max Spd Stop Typ] Parameter Description
0 = Use Safe Torque Off with Check for
Standstill (Torque Off) The safety option initiates Safe Torque Off with Check for Standstill any
time an SMS Speed fault is detected while the safety option is
monitoring motion.
1 = Use Configured Stop Type (Safe Stp Typ) The safety option initiates the configured P45 [Safe Stop Type] parameter
any time an SMS Speed fault is detected while the safety option is
monitoring motion.
Configured Stop
P46 [Stop Mon Delay]
Stop Delay Begins Immediately
P47 [Max Stop Time]
SMS Speed Fault
P48 [Standstill Speed]
Speed
Time
P62 [Safe Max Speed]
P51 [Stop Decel Tol]
(1) 100 kHz for Sin/Cos or 200 kHz for Incremental