Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 154)

Load Initial Profile Setpoints
Chapter 8
8-37
Start Overrun Zone Setpoint
(OPC61)
The QDC module uses this position as protection against opening the
clamp too far. If the clamp reaches this position during any of the first
three clamp open profiles ( FOC, SOC, or TOC), the QDC module
immediately terminates the ongoing profile and either:
begins the open slow profile (OSC)
sets its outputs to zero
(depending on the state of OPC03-B11, the overrun zone bit)
Figure 1.2
Example R4 Setpoints
Mold Safe
Clamp Motion
Fully Open
zero
OPC62) (OPC61) (CPC62)
OSC
Overrun Zone
We recommend an initial value larger than the start OSC position you
would typically use during normal machine operation.
Record a value for OPC61 that is a safe distance from fully open (OPC62).
The valve spanning procedures in chapter 9 require these initial OPC61
and OPC62 values. We help you select correct final values for your
application in chapter 10. For additional information, refer to Section 3 of
the Plastic Molding Module Reference Manual (publication 1771-6.5.88).
EndĆofĆsegment Position Setpoint
(OPC11, 14, 17, 20, 23, 26, 29, 32, 35, 38)
Configure only the first clamp open profile segments.
Determine end-of-segment position setpoints for the first clamp open
profile as follows:
1. Jog the mold fully closed and observe the value in SYS27 (N40:179).
2. Subtract the mold safe position setpoint (CPC62) from the value you
recorded for start overrun zone setpoint (OPC61).
3. Divide this difference into three equal sections. The dividing line of
each section should be recorded for the end-of-segment position
setpoints for segments 1, 2, and 3.
Important: Measure end-of-segment positions from zero (mold safe).