Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 122)

122 Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1 Detail Drive Configuration and Operation
• Bit 8 - “Spd Reg En” Indicates that the output of the speed regulator is
enabled and the output is allowed to enter the torque loop.
Speed Reference Limits
At this point the summed speed reference is limited by parameters 30 [Rev Speed
Limit] and 31 [Fwd Speed Limit]. Those limits are set at -2187.5 RPM and
2187.5 RPM default.
Current Limit Stop
When a current limit stop is commanded, [Logic Ctrl State] bit 6 - “CurrLim
Stop” is set. Then a 0 speed reference command is sent into the speed regulator,
bypassing the ramp and speed trimming.
Speed Error
The summed speed reference becomes parameter 301 [Motor Speed Ref ]. Then
the filtered motor speed feedback is subtracted from the motor speed reference to
create a speed error.
0
Autotune
Bypass
19
157 5
8
157 04
Logic Ctrl State
Atune Spd Ref
Logic Ctrl State
(Inrta Tst En)
(J Tst FulSpd)
(Spd Reg En)
1
30
31
Limit
Rev Speed Limit
Fwd Speed Limit
0
1
157 06
0
Logic Ctrl State
(CurrLim Stop)