Rockwell-automation 21G PowerFlex 750-Series AC Drives Programming Man Manual de usuario descargar pdf (Pagina 469)

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Rockwell Automation Publication 750-PM001J-EN-P - October 2014 469

Application Notes Appendix B

Fine Tuning

P1195 [Pump Off Level], P1196 [Pump Off Speed], and P1197 [Pump Off

Time] all contribute to the productivity of the well and need to be adjusted. For

more information read the parameter descriptions in Chapter 3

Occasionally the position starts to drift relative to the torque signature. If this

occurs, set P1188 [Pump Off Setup] Bit 1 “Pos Offset” to 1. See Figure 78

for an

example of what this drift would look like.

Figure 78 - Correcting Drift

Notice how the position has drifted relative to the torque causing a different part

of the waveform to be averaged as the down stroke torque. This drift results in a

false pump off condition. Setting the position offset bit corrects this drift.

Sleep Mode

If P1189 [Pump Off Action] is set to 1 “Always Stop,” 2 “Stop After 1,” or 3 “Stop

After 2,” the Sleep Wake function must be configured. Set the following

parameters.

Parameter Setting

Start Features

P350 [Sleep Wake Mode] 1 “Direct” (Enabled)

P351 [SleepWake RefSel] 1207 (Entered through the Numeric Edit tab.)

P355 [Wake Time] Desired restart time (64800 seconds maximum).

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Rockwell-automation 21G PowerFlex 750-Series AC Drives Programming Man Manual de usuario Pagina 469

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