Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 15)

Overview of the Clamp and Eject Mode
Chapter 1
1-4
Low Pressure Close
Use the Low Pressure Close Profile to decelerate closing motion to guard
against damaging the mold halves and detect for part obstructions. The
pressure setpoint that you select to control low pressure close should
prohibit the mold from fully closing if there is an obstruction. Up to two
low pressure close profile segments may be used.
You will use the pressure vs. position control mode for low pressure close.
Figure 1.4
Example Low Pressure Close
Clamp
Cylinder
Moving
Platen
Low Pressure Close
Position
Pressure
L 0 X
Segments
1
2
Stationary
Platen
Important: If you need only one Low Pressure Close segment, configure
the 1st segment of the Low Pressure Close Profile.
The QDC notifies your PLC program when this profile is complete and
automatically uses end-of low pressure close set-output values to build
tonnage (on a hydraulic machine) or lockup your toggle (on a toggle
machine).