Rockwell Automation 1771-QI,D17716.5.126 PLASTIC MOLD.MODULE - Manual (Page 134)

5–2 Sequencing Co-injection
Publication 1771-6.5.126 – March 1998
You can use either standard or co-injection programming for this sequence.
ЙЙЙЙЙЙЙЙ ЗЗЗЗЗЗ
ЗЗЗЗЗЗ
A
B
Time
Standard Programming
Set up QI(A) to wait at the end of its injection profile, and QI(B) to
bridge into pack/hold. You command QI(A) to inject to completion
and wait. Once your ladder code sees injection complete bit
(SYS02:B04) transition from F to T, your code commands QI(B) to
start injection. When QI(B) completes injection, it will automatically
bridge to pack/hold and complete the cycle.
This technique requires one program scan (20 to 50 msec) before
QI(B) is commanded to start injection. If you require a faster
response, use co-injection programming.
Co-injection Programming
Use co-injection parameter IPCB08 to define the screw position of A
at the end of its profile at which to start QI(B)’s injection. You
command QI(A) and (B) to start at the same time. QI(A) completes
first and waits at the end of its profile. QI(B) starts injection when A
reaches screw position (aaa) set in IPCB08. Once QI(B) completes
injection, it goes into pack/hold and completes the cycle.
This technique starts QI(B)’s profile within 2 msec of seeing screw
position (IPCB08) at the end of QI(A)’s profile.
Description: QI(A) setup: QI(B) setup: Co–inj. word/bit:
enable injection cycle suspension on start No Yes DYCB03-BO4 = 1
disable automatic sequence into pack/hold Yes No IPC02-B08 = 1
enable injection cycle suspension on screw position No No IPC02-B10 = 0
screw position (of other) to exit suspended injection No at aaa IPCB08 = aaa
screw position to suspend own injection No No IPC56 = zero
QI(A)’s Injection Profile
aaa
1 2 3 4
2 1 3
0
0
QI(B)’s Injection Profile
Pressure
Pressure
Time
Time
suspended start
A then B