Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 291)

Rockwell Automation Publication 20P-UM001I-EN-P - February 2013 291
Application Notes Appendix C
Speed Threshold Indicators
There are two speed threshold functions available that can be programmed via a
digital output to provide indication of when the drive has exceeded certain set
points.
Par 393 [Speed Threshold] displays whether the speed of the drive is above or
below a set speed for clockwise and counter-clockwise rotation. Set the threshold
speed for clockwise rotation in Par 101 [Speed Thresh Pos] and set the threshold
speed for counter-clockwise rotation in Par 102 [Speed Thresh Neg]. You can
specify a delay time before indication that the speed has fallen below the
threshold values in Par 103 [Threshold Delay]. Par 393 [Speed Threshold] can
be assigned to a digital output. A digital output so assigned will only change state
at the clockwise (positive) speed threshold.
Par 394 [At Speed] indicates whether or not the speed of the drive corresponds to
the set speed reference (specified in Par 118 [Speed Reg In]) before the speed
regulator and the ramp reference (if enabled) are applied. The speed above and
below the speed reference at which indication will occur is set in Par 104 [At
Speed Error]. You can specify a delay time before indication that the speed
reference is within the range set in Par 104 [At Speed Error] will occur using Par
105 [At Speed Delay]. Par 394 [At Speed] can be assigned to a digital output.
0 t
P122
Spd Feedback
P101
Speed Thresh Pos
P102
Speed Thresh Neg
P103
Threshold Delay
[Digital Outx Sel]
= 2 “Spd Thresh”
Speed Threshold
P393