Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 117)

Rockwell Automation Publication 750-RM001F-EN-P - February 2012 117
Safe Maximum Speed and Direction Monitoring Chapter 9
You define the Safe Stop Type initiated by the safety option in the event of an
Acceleration fault by using the P66 [Max Acc Stop Typ] parameter.
If an Acceleration fault is detected during a Stop Monitoring Delay P46 [Stop
Mon Delay] and the P66 [Max Acc Stop Typ] parameter is configured as Use Safe
Torque Off with Check for Standstill (Torque Off ), the Stop Monitoring Delay
P46 [Stop Mon Delay] ends immediately and Stop Delay P47 [Max Stop Time]
begins.
If an Acceleration fault is detected during the Stop Delay P47 [Max Stop Time],
and the P66 [Max Acc Stop Typ] parameter equals Use Configured Stop Type
(Safe Stp Typ), and feedback signals indicate less than the maximum frequency
(1)
for your encoder type, then the fault occurs with no further action. Deceleration
Monitoring performs the safety function during the Stop Delay P47 [Max Stop
Time]. That is, if an Acceleration fault occurs during the Stop Delay P47 [Max
Stop Time], the fault is ignored and the stopping action continues.
Figure 42 - Acceleration Fault When P66 [Max Acc Stop Typ] Set to ‘Use Configured Stop Type (Safe
Stp Typ)’
If an Acceleration fault is detected during the Stop Delay P47 [Max Stop Time]
and the P66 [Max Acc Stop Typ] parameter equals Use Safe Torque Off with
Check for Standstill (Torque Off ), the Acceleration fault is reported and Motion
Power is removed. The Stop Delay P47 [Max Stop Time] continues with
standstill checking enabled.
P66 [Max Acc 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 Acceleration fault is detected while the safety option is
monitoring motion.
1 = Use Configured Stop Type (Safe Stp Typ) The safety option initiates the configured Safe Stop Type any time an
Acceleration fault is detected while the safety option is monitoring
motion.
(1) 100 kHz for Sin/Cos or 200 kHz for Incremental
Stop Request
Stop Delay
P47 [Max Stop Time]
Acceleration Fault
P66 [Max Acc Stop Typ]
P48 [Standstill Speed]
Speed
Time
P51 [Stop Decel Tol]