Rockwell-automation 21G PowerFlex 750-Series AC Drives Programming Man Instrukcja Użytkownika Pobierz pdf (Strona 497)

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Rockwell Automation Publication 750-PM001J-EN-P - October 2014 497

Using DeviceLogix Appendix C

Example logic requirements:

• If Critical High Level or High Level sensor is ON, then start the drive.

– If Critical High Level sensor is ON, then switch to higher rate (90Hz)

for the rest of the pumping cycle. Else run at the normal rate (60Hz)

– Run until all three level sensors are OFF

– Pump should run at least ‘x’ minutes at a minimum. If the Low Level

sensor fails, this prevents the High Level sensor from cycling the pump

On/Off too quickly.

• Annunciate a Sensor Fault condition

– The Low Level sensor should never be OFF when either the High Level

or Critical High Level sensors are ON

– The High Level sensor should never be OFF when the Critical High

Level sensor is ON

– The Critical High Level sensor should never be ON when either the

High Level or Low Level sensors are OFF

• Annunciate a Critical High Level condition

– The Critical High Level output should never be ON

• Annunciate if pumping cycle time is longer than normal (‘y’ minutes)

– Monitor the amount of time a pump cycle takes by timing how long the

drive is operating.

– If greater than ‘y’ minutes, energize the Too Much Time Alarm output

• Reset alarms / faults with a Reset pushbutton input

Parameter Configuration

The following parameters are configured for this example.

The following DeviceLogix parameters are configured for this example:

Port Parameter

No.

Parameter Value Description

0.520 Max Fwd Speed 90.00

0.545 Speed Ref A Sel Port 0: Preset Speed 1

0.571 Preset Speed 1 60.00 Normal pumping rate (60Hz)

0.573 Preset Speed 3 90.00 High speed pumping rate (90Hz)

4.10 RO0 Select Port 14: DLX DigOut Sts2.DLX

DOPSts0

Sensor Fault output

4.20 TO0 Select Port 14: DLX DigOut Sts2.DLX

DOPSts1

Critical High Level Fault output

4.30 TO1 Select Port 14: DLX DigOut Sts2.DLX

DOPSts2

Too Much Time Alarm output

14.33 DLX DIP 1 Port 4: Dig In Status.Input 1 Critical High Level Sensor input

14.34 DLX DIP 2 Port 4: Dig In Status.Input 2 High Level Sensor input

14.35 DLX DIP 3 Port 4: Dig In Status.Input 3 Low Level Sensor input

14.36 DLX DIP 4 Port 4: Dig In Status.Input 4 Alarm / Fault Reset pushbutton

input

1 2 ... 492 493 494 495 496 497 498 499 500 501 502 ... 543 544

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