Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 113)

Load Initial Profile Values
Chapter 8
8-18
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 recorded these bits on Worksheet 8-C.
Profile Offset Sign
(PPC03)
Profile offset lets you shift the amplitude of entire profiles up or down, if
necessary. The offset sign determines the direction of shift.
-BIT 13 controls the direction of pressure profile offset.
0 = positive offset (more pressure)
1 = negative offset (less pressure)
-BIT 12 controls the direction of RPM profile offset.
0 = positive offset (higher RPMs)
1 = negative offset (lower RPMs)
We recorded B13 = B12 = 0 for positive offset on Worksheet 8-C.
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 recorded this bit = 1 to stop and set outputs on Worksheet 8-C.
Profile Algorithm
(PPC03)
The following bits determine the type of plastication profile.
-BITS 01 and 00 select the algorithm for the plastication profile.
00 = Ram (screw) backpressure vs. position
01 = Ram (screw) backpressure vs. time
10 = Screw RPM vs. position
11 = Screw RPM vs. time
We recorded B01 = B00 = 0 for backpressure vs. position on
Worksheet 8-C.
Important: All other bit selections in PPC03 should be zero.
Determine Bit Selections
for Worksheet 8ĆC