Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 139)

Span Your Clamp and Ejector Valves
Chapter 9
9-3
Important: Maintain the same initialization values that you entered in
previous chapters except where noted in the text.
We recommend you first span your Low Pressure Close Pressure Valve.
Do this in five parts:
Revise/confirm critical values for pressure valve spanning
Span your Low Pressure Close Pressure Valve
Test your values
Set up tonnage (on hydraulic clamps) and holding pressure (on toggle
clamps)
Set pressure alarm setpoints
Important: Many injection molding machine OEMs and hydraulic 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 Low
Pressure Close, enter the values into LPC41-44, and proceed to the section
in this chapter on Setting Tonnage.
Revising/Confirming Critical Values
Over the last two chapters, you entered values into configuration blocks
and profile blocks necessary to run clamp close 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 Low Pressure Close Profile, your current configuration should:
Disable Expert Response Compensation (CPC04-B15 = 1)
Identify the selected pressure control valve (LPC02)
Identify Unselected Valve Set-Output Values (LPC09-12)
Enable Open-Loop Control (CPC04-B07 = 1)
Disable all ramping with 0 as ramp accel and decel setpoints (LPC17-20
for accel, LPC25-28 for decel)
Identify pressure control limits (LPC41-42) and corresponding min and
max outputs (LPC43-44)
Identify Start LPC Position Setpoint (CPC61)
Identify Mold Safe Position Setpoint (CPC62)
Span Your Low Pressure
Close Valve