beautypg.com

Suspended outputs are programmed – Rockwell Automation 1771-QI,D17716.5.126 PLASTIC MOLD.MODULE User Manual

Page 136

background image

5–4

Sequencing Co-injection

Publication 1771-6.5.126 – March 1998

Suspended Outputs are Programmed

Co-injection lets you program suspended outputs with these choices:

suspended outputs are turned off (previous example)

suspended outputs are your set-outputs in INC61-64 (example 1)

the injection output is closed-loop controlled (example 2)

For these examples, refer to the diagram on the next page.

Example 1, You suspend QI(A)’s outputs with set-outputs:

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

No

Yes

IPCB02-B08 = 1

enable injection cycle suspension on screw position

Yes

No

IPC02-B10 = 1

During suspended injection, when using closed-loop control of the
injection valve, the other three outputs are set-outputs in INC61-64.
B12 B11
0 0

=

control

all four outputs with set-outputs stored in INC61-64

0

1

= control injection valve with pressure setpoint in IPC55

1

0

= control injection valve with velocity setpoint in IPC54

1

1

= error condition

all four
outputs are
set-outputs

n/a

IPC02-B11 = 0
IPC02-B12 = 0

screw position (of other) to exit suspended injection

at bbb

at aaa

IPC08 = bbb
IPCB08 = aaa

velocity setpoint for closed-loop control during suspended injection

No

No

IPC54 = zero

pressure setpoint for closed-loop control during suspended injection

No

No

IPC55 = zero

screw position to suspend own injection

at aaa

No

IPC56 = aaa

your velocity or pressure set-outputs during suspended injection

in INC61-64

n/a

INC61-64

Example 2, You suspend QI(A)’s outputs with a closed-loop injection
pressure control setpoint (ppp.p) in IPC55 and your set-outputs in
INC61-64. (IPC55 overrides its equivalent set-output in INC61-64.)

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

No

Yes

IPCB02-B08 = 1

enable injection cycle suspension on screw position

Yes

No

IPC02-B10 = 1

During suspended injection, when using closed-loop control of the
injection valve, the other three outputs are set-outputs in INC61-64.
B12 B11
0 0

=

control

all four outputs with set-outputs stored in INC61-64

0

1

= control injection valve with pressure setpoint in IPC55

1

0

= control injection valve with velocity setpoint in IPC54

1

1

= error condition

Closed-loop
pressure
setpoint

n/a

IPC02-B11 = 1
IPC02-B12 = 0

screw position (of other) to exit suspended injection

at bbb

at aaa

IPC08 = bbb
IPCB08 = aaa

velocity setpoint for closed-loop control during suspended injection

No

No

IPC54 = zero

setpoint for pressure control during suspended injection

at ppp.p

n/a

IPC55 = ppp.p

screw position to suspend own injection

at aaa

n/a

IPC56 = aaa

your set-outputs during suspended injection

at INC61-64

n/a

INC61-64