Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 220)

Span Your Valves
Chapter 9
9-54
Span Your Ejector Pressure Valve(s)
Span your ejector valve(s) for smooth operation at highest desired
pressure. Do this in the following procedure by finding the optimum
values for:
Minimum Pressure Control Limit EAC41, ERC41
Maximum Pressure Control Limit EAC42, ERC42
Selected Pressure Valve, Output for Minimum EAC43, ERC43
Selected Pressure Valve, Output for Maximum EAC44, ERC44
Important: This procedure must be done twice, because cylinder
dynamics are different for the rod side and piston side.
Important: If PanelView is operational for ejector profiles, use it to:
observe actuals
change and download setpoints
run profiles
Important: We suggest that you read this procedure before starting.
ATTENTION: As with any machine start-up, install a test
mold. Programming errors, configuration errors, or hydraulic
problems could lead to personal injury and/or machine damage.
ATTENTION: Be sure all machine guards and shields are in
place before proceeding to guard against personal injury.
1. Jog your ejectors to the full advanced position.
2. Align all other machine hydraulics to simulate ejector advance.
For example, enable required pumps and align required valves.
3. Copy initial values from EAC09-12 (N45:05-08) into DYC09-12
(N40:121-124) of your PLC-5 data table with this exception:
Important: Enter a value that gives zero pressure into the word for output
1, 2, 3, or 4 (DYC09-12) that drives the selected ejector pressure valve.
ATTENTION: A value of 0 does not always correspond to zero
pressure or flow. For example, a bi-directional valve requires a
set-output value of 50% (5000) to obtain 0 PSI.
4. Enable set-output by setting DYC01-B08 (B34/392) to 1. The QDC
module applies the values in DYC09-12 directly to its outputs 1-4.