Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 81)

Chapter 5
Developing Programs
5-21
Sample ControlĆLogic Program
The following is a control-logic programming example. This control-logic
program initiates a block-transfer write and a read when triggered by the
control coprocessor. See the sample C—on page 5-18—and BASIC— on
page 5-20—control-coprocessor programs.
Rung 2:0
This block-transfer write will be triggered when bit 10 of the input image is
set by the control coprocessor. The coprocessor triggers this bit using the
trigger mask within the BPI_READ function. The second conditional bit is the
enable bit of the block-transfer control block. This ensures that the rung
will be toggled false to true every time the block transfer completes. The
coprocessor is located in rack 0, group 2 of the chassis.
| I:002 N10:0 +BTW--------------------+ |
+--] [---]/[------------------------------------+BLOCK TRNSFR WRITE +-(EN)-+
| 10 15 |Rack 00| |
| |Group 2+-(DN) |
| |Module 0| |
| |Control Block N10:0+-(ER) |
| |Data file N10:10| |
| |Length 10| |
| |Continuous N| |
| +-----------------------+ |
Rung 2:1
This block-transfer read will be triggered when bit 11 of the input image is
set by the control coprocessor. The coprocessor triggers this bit using the
trigger mask within the BPI_WRITE function. The second conditional bit is the
enable bit of the block-transfer control block. This ensures that the rung
will be toggled false-to-true every time the block transfer completes.
| I:002 N11:0 +BTR--------------------+ |
+--] [---]/[------------------------------------+BLOCK TRNSFR READ +-(EN)-+
| 11 15 |Rack 00| |
| |Group 2+-(DN) |
| |Module 0| |
| |Control Block N11:0+-(ER) |
| |Data file N11:10| |
| |Length 5| |
| |Continuous N| |
| +-----------------------+ |
Rung 2:2
| |
+--------------------------------[END OF FILE]---------------------------------+
| |
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