Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 148)

Load Initial Profile Values
Chapter 8
8-27
Expert Response Compensation
(PPC04)
- BITS 09 and 08 determine whether you apply Expert Response
Compensation (ERC) to plastication 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 set these bits to 1 (ERC = Off) on Worksheet 8-D.
OpenĆloop or ClosedĆloop Control
(PPC04)
- BITS 01 and 00 determine whether you use open- or closed-loop
control of plastication profiles. In open loop, a valve position moves
the cylinder without sensor feedback. In closed loop, sensor feedback
controls the valve regulating pressure.
0 = Closed loop
1 = Open loop
We set these bits to 1 for open-loop control on Worksheet 8-D.
Important: All other bit selections in PPC04 should be zero.
The valve spanning procedures in chapter 9 require these initial bit
settings. Where required, we help you select 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).
Backpressure Setpoints
(PPC10, 14, 18, 22, 26, 30, 34, 38, 42, 46, and 50)
Use these words when configuring backpressure vs. position or time
profiles. You enter pressure in PSI or Bar. Each setpoint controls the
pressure of its corresponding segment. You may use from 1 to 11 segments
in your profile. The procedures in chapter 9 require all eleven.
Enter backpressure setpoints on Worksheet 8-D equal to the maximum
plastication backpressure you would ever expect in the backpressure vs.
position profile for each of the 11 backpressure setpoints listed above.
The valve spanning procedures in chapter 9 require these initial values. For
additional information, refer to the Plastic Molding Module Reference
Manual (publication 1771-6.5.88).
Determine Word Values
for Worksheet 8ĆD