Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 163)

Span Your Clamp and Ejector Valves
Chapter 9
9-27
We recommend that you next tune the Ejector Profile for pressure
performance. Do this in four parts:
Revise/confirm critical values for pressure valve spanning
Span your ejector pressure valve(s)
Test your values
Set pressure alarm setpoints
Important: Many injection molding machine OEMs and hydralic valve
manufacturers provide data regarding valve spanning (working range) for a
particular valve on their machine. If valve spanning information is
available from your OEM for your machine’s pressure valve during ejector
operations, enter the values into EAC41-44 and ERC41-44, and proceed to
the section in this chapter on setting Ejector pressure alarm setpoints.
Revise/Confirm Critical Values
Over the last two chapters, you entered values into configuration blocks
and profile blocks necessary to run ejector profiles in open-loop. At this
time, review the current values of the critical settings identified below.
New parameters which need to be set are also identified. Maintain the
same configuration and profile values entered over the last two
chapters unless directed to do so otherwise in this chapter.
Verify that all entries made from the previous two chapters are correct. For
the Ejector Profile, your current configuration should:
Disable Expert Response Compensation (EPC04)
Identify the selected pressure control valve(s) (EAC02, ERC02)
Identify Unselected Valve Set-Output Values (EAC09-12, ERC09-12)
Select Pressure vs. Position Control (EPC03)
Enable Open-Loop Control (EPC04)
Disable all ramping with 0 as ramp accel and decel setpoints
(EAC17-20, ERC17-20 for accel, EAC25-28, ERC25-28 for decel)
Identify pressure control limits (EAC41-42, ERC41-42) and
corresponding min and max outputs (EAC43-44, ERC43-44)
Identify all end-of segment position setpoints (EPC11, EPC14, EPC23,
EPC29, EPC35, EPC38). These should remain zero from the initial
settings
Identify Ejector Advanced Position Setpoint (EPC59)
Identify Ejector Retracted Position Setpoint (EPC60)
Enable Ejectors to start on command (EPC03-B08 = 1 and
EPC03-B09 = 0)
Span Your Ejector
Pressure Valve(s)