Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 146)

146 Rockwell Automation Publication 750-RM001F-EN-P - February 2012
Chapter 11 Configuration Examples
In this example application, the Safe Stop input (SS_In) monitors an E-
Stop button with two normally-closed (2NC) contacts.
3. Choose the P45 [Safe Stop Type] parameter.
4. Set the P45 [Safe Stop Type] parameter value to 1, which equals Safe Stop
1.
Safe Stop 1 monitors deceleration profiles. When Standstill Speed is
detected within the Stop Delay [Max Stop Time], the safety option
switches off Motion Power and sets door control logic to Unlock.
5. Choose the P47 [Max Stop Time] parameter.
The default value is 0 s, but you can enter a value from 0…6553.5 s.
6. Type the value of the expected ramp-to-stop time plus a reasonable
tolerance after the Safe Stop command is initiated.
If the machine’s speed is not below the Standstill Speed within the Max
Stop Time period you entered, a Stop Speed Fault occurs and door control
logic remains set to Lock until Standstill Speed is reached.
7. Choose the P48 [Standstill Speed] parameter.
The default value is 0.001 rpm, but you can enter a value from
0.001…65,535 rpm. The Standstill Speed is measured in revolutions per
minute, because the P29 [Fbk 1 Units] parameter is configured for Rotary
feedback.
8. Enter a value in the P48 [Standstill Speed] parameter field to define the
speed at which the safety option determines standstill has been reached.
9. Choose the P49 [Standstill Pos] parameter.
The default value is 10 degrees, but you can enter a value from 0…65,535
degrees. The Standstill Position is measured in degrees because the P29
[Fbk 1 Units] parameter is configured for Rotary feedback.
10. Enter the value to define the position limit in encoder units that is
tolerated after standstill has been reached.
11. Choose the P50 [Decel Ref Speed] parameter.
The default value is 0 RPM, but you can enter a value from 0…65,535
RPM. The Decel Ref Speed parameter is used to verify that the speed is
decelerating at the desired rate.
12. Enter a number greater than the Max Speed (2000 in this example).
13. Choose the P51 [Stop Decel Tol] parameter.
The Stop Decel Tol parameter determines the total percentage of the
Decel Ref Speed that is used as the upper limit of deceleration speed.
14. Enter 100% for this example.
15. Go to the next section to set the parameters found in the Limited Speed
parameters group.