Rockwell Automation 20B PowerFlex 700 Custom Firmware - Pump Off - Manual (Page 2)

2 PowerFlex 700 with Vector Control Option Custom Firmware
Rockwell Automation Publication 20B-IN020C-EN-P - January 2014
This custom firmware differs from the PowerFlex 700 Vector Control standard firmware
(version 4.006, Series B) in the following ways:
•
Custom firmware parameters (see pages 5 through 9 ).
•
Parameter 178 [Sleep Time] maximum value changed from 1000 to 64,800 seconds.
•
The PowerFlex 700 Pump Jack Pump Off custom firmware cannot be updated over
PowerFlex 700 firmware.
For additional drive information including the basic pumpjack oil well parameter descriptions
and other standard firmware parameters, refer to the PowerFlex 700 AC Drives – Frames 0…10
User Manual, Vector Control Firmware 4.001 and Up, publication
20B-UM002 .
Custom Firmware Overview
This section provides an overview of the custom firmware functions.
Pump Off Function
The pump off function can be set to use a torque baseline (created when the drive is first run or
the commanded speed is changed) or a fixed set point. A fixed set point is useful if the drive is
faulting due to well conditions. The drive does not create a new set point based on what can be a
“pump off ” condition.
Baseline Disable Function
When Pump Off Control is enabled, a torque baseline is created each time the drive is started.
The control uses this baseline when parameter 682 [Pump Off Control] is set to option 1,
“Baseline Set”.
The “Baseline Disable” function disables the calculation of a new torque baseline each time the
drive is started. When one of the “Baseline Disable” selections is enabled, the drive uses the
torque baseline that was previously calculated and saved.
If a “Baseline Disable” selection is enabled and there is no existing torque baseline (torque values
in the baseline are zero), the drive calculates a torque baseline when it is started and a stable
running condition is reached.
The saved torque baseline is erased when all “Baseline Dis” selections are off and the drive is
running, or when [Pump Cycle Store] is selected.
Downstroke Torque Function
The downstroke torque can change position on some wells. If this happens the variance of the
torque waveform can change enough that the position synchronization does not work properly.
This can be seen on the position test point (the position continues to reset early). To function
properly on these pumps, the torque waveform is averaged over one cycle.