Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 223)

Span Your Valves
Chapter 9
9-57
What You Have Accomplished
The valve spanning procedure you just completed has defined the:
range of pressure available during any ejector profile
end-of-range minimum and maximum signal levels for linear control of
the ejector 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 EAC41, ERC41 EAC43,. ERC43
Maximum EAC42, ERC42 EAC44, ERC44
Now for open-loop ejector profiles, the QDC module assumes a liner
relationship between ejector pressure and signal output.
Set the Profile Pressure Alarm
Set the maximum pressure alarm EAC57 (N45:53) equal to an ejector
pressure that should:
not be exceeded during the ejector profile
not be greater than EAC42 (N45:38) or ERC42 (N45:98) maximum
pressure control limits
Entering zero disables this alarm.
Download the EAC block to the QDC module.
Important: If downloading from your programming terminal, download
EAC followed by EPC, with download bits B21/21 and 23 (chapter 4).