Emerson VSG & VSSG Troubleshooting Guide download pdf (Page 13)

VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL

Compressor Operation with VFD Drive

Start

Compressor

Start VFD at

Minimum Speed

(30 Hz Typ.)

Is Control Press.

Within Setpt

Deadbands?

Increase or Decrease the

Compressor Capacity Slides to

Match Setpoints

Is Capslide @

100%

Increase or Decrease the

Compressor Capacity Slides to

Match Setpoints

Increase or Decrease Motor Speed

@ Rate Defined by VFD PID

Parameters

Is Control Press @

Setpoint?

Is Motor Speed @

Min?

Yes

Check/Adjust Capacity Slide

Check/Adjust VFD

Yes

Operational Flow Charts

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 71 72

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Emerson VSG & VSSG Troubleshooting Guide Page 13