Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 147)

Load Initial Profile Values
Chapter 8
8-26
Plastication Profile Block Identifier
(PPC01)
Bits 07-00 of this word identify it as the first word in a series used to
define the plastication profile. These bits must be set to 00001111.
We entered these bits on Worksheet 8-D.
Profile Offset Sign
(PPC03)
The profile offset lets you shift the amplitude of the entire profile up or
down, if necessary. The offset sign determines the direction of shift.
- BIT 13 selects the profile offset sign for the plastication profile.
0 = positive offset (more pressure)
1 = negative offset (less pressure)
We set this bit to 0 for positive offset on Worksheet 8-D.
Logical Bridge
(PPC03)
The logical bridge controls the action taken by the QDC module when it
completes the plastication profile.
- BIT 08 determines if the QDC continues to the post-decompression
movement after the plastication profile, or stops and sets outputs.
0 = continues to post-decompression
1 = stops and sets outputs
We set this bit to 1 to stop and set outputs on Worksheet 8-D.
Profile Algorithm
(PPC03)
The following bit determines the type of plastication profile.
- BIT 00 selects the algorithm for the plastication profile.
0 = Ram (screw) backpressure vs. position
1 = Ram (screw) backpressure vs. time
We set this bit to 0 for backpressure vs. position on Worksheet 8-D.
Important: All other bit selections in PPC03 should be zero.
Determine Bit Selections
for Worksheet 8ĆD