Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE User Manual

Page 203

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Span Your Valves

Chapter 9

9-46

What You Have Accomplished

The valve spanning procedure you just completed has defined the:

range of pressure available during any clamp open profile

end-of-range maximum and minimum signal levels for linear control of

the clamp open pressure valve in open-loop control.

For this

range limit

When trying to obtain the

pressure in:

The QDC module drives the selected

pressure valve to % output signal in:

Minimum

FOC41,SOC41,TOC41,OSC41 FOC43, SOC43, TOC43, and OSC43

Maximum

FOC42,SOC42,TOC42,OSC42 FOC44, SOC44, TOC44, and OSC44

Now, for all open-loop pressure profiles for clamp open, the QDC module
assumes a linear relationship between clamp pressure and signal output.

Set Profile Pressure Alarms

For clamp open profiles, set the maximum pressure alarm (FOC57,
SOC57, TOC57, OSC57) to a pressure value that should:

not be exceeded during the clamp profile
not exceed the max pressure control limit

FOC42, SOC42, TOC42, and OSC42

Entering a value of zero disables these alarms.

Download new values to the QDC module.

Important: If downloading from your programming terminal, download
FOC, SOC, TOC, OSC, and OPC in that order (chapter 4):

To download

Set B21/

FOC

16

SOC

17

TOC

18

OSC

19

OPC

20

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