Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 180)

Span Your Valves
Chapter 9
9-23
What You Have Accomplished
The open-loop tuning procedure you just completed has defined the:
range of ram (screw) backpressure during plastication
end-of-range maximum and minimum signal levels for linear control of
the injection 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 INC41 INC43
Maximum INC42 INC44
Now, for all open-loop injection pressure profiles, the QDC module
assumes a linear relationship between ram pressure and signal outputs.
Set the Profile Pressure Alarm
Set the profile pressure alarm INC57 (N44:53) for the ram (screw) to a
pressure that should:
not be exceeded during the injection profile
not exceed the maximum pressure control limit INC42 (N44:38)
Entering a value of zero disables this alarm.
Download new value to the QDC module by downloading the INC and
IPC blocks.
Important: If downloading from your programming terminal, download
INC followed by IPC with download bits B21/7 and 8 (chapter 4).