Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 108)

Load Initial Profile Values
Chapter 8
8-13
Profile Algorithm
(HPC03)
The following bits of HPC03 determine whether the pack and/or hold
profiles use the ram (screw) or cavity pressure algorithm.
-BIT 02 selects the algorithm for the hold profile.
-BIT 00 selects the algorithm for the pack profile.
0 = Ram (screw) pressure vs. time
1 = Cavity pressure vs. time
We recorded these bits = 0 for ram pressure vs. time on Worksheet 8-B.
Important: All other bit selections in HPC03 should be zero.
Expert Response Compensation
(HPC04)
-BITS 11, 10, 09, and 08 determine whether you apply Expert
Response Compensation (ERC) to pack and hold profiles. ERC is an
exclusive algorithm that adjusts for changes in your machine,
hydraulics, raw materials, and other process variables. It compensates
for abrupt upsets and long term deviations.
0 = Expert Response Compensation ON
1 = Expert Response Compensation OFF
We recorded these bits = 1 (ERC = Off) on worksheet 8-B
OpenĆor ClosedĆloop Control
(HPC04)
-BITS 03, 02, 01, and 00 determine open- or closed-loop control of
pack and hold profiles. In open loop, you set a valve position to
move the cylinder without sensor feedback . In closed loop you use
sensor feedback to control the valve regulating pressure.
0 = Closed loop
1 = Open loop
We recorded these bits = 1 for open-loop control on worksheet 8-B.
Important: All other bit selections in HPC04 should be zero.
The valve spanning procedures in chapter 9 require these initial bit
settings. Where required, we help you select the correct final bit settings
for your application in chapter 10. For additional information, refer to the
Plastic Molding Module Reference Manual (publication 1771-6.5.88).