Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 162)

Load Initial Profile Setpoints
Chapter 8
8-45
OpenĆloop or ClosedĆloop Control
(EPC04)
- BITs 01 and 00 determine whether you use open- or closed-loop
control of ejector profiles. In open loop, a valve position moves the
cylinder without sensor feedback. In closed loop, sensor feedback
controls the valve regulating the pressure or velocity.
0 = Closed loop
1 = Open loop
We recorded a value of 1 for open-loop control on Worksheet 8-A.
Important: All other bit selections in EPC04 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)
Velocity Setpoints
(EPC09, 12, 15, 21, 27, 33, 36, 39)
Use these words to configure velocity vs. position profiles in units per
second. Each velocity setpoint controls the velocity of its corresponding
segment.
We recorded zero for these setpoints on Worksheet 8-F.
Pressure Setpoints
(EPC10 and 34)
(EPC13, 16, 22, 28, 37, and 40)
Use these words to configure pressure vs. position profiles in PSI or Bar.
Each pressure setpoint controls the pressure of its segment.
Configure only the 1st full advance and the 1st full retract segments for a
pressure vs. position profile for machine tuning in chapter 9. Do this by
recording typical pressure setpoints for normal machine operation into:
EPC10 full advance, segment 1, pressure setpoint
EPC34 full retract, segment 1, pressure setpoint
We recorded zero for the other pressure setpoints on Worksheet 8-F.
Determine Word Values for
Worksheet 8ĆF