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921
Step Instructions
Section 3-22
Application Examples
The following three examples demonstrate the three types of execution con-
trol possible with step programming.
Example 1
demonstrates sequential exe-
cution;
Example 2
, branching execution; and
Example 3
, parallel execution.
Example 1:
Sequential Execution
The following process requires that three processes, loading, part installation,
and inspection/discharge, be executed in sequence with each process being
reset before continuing on the next process. Various sensors (SW1, SW2,
SW3, and SW4) are positioned to signal when processes are to start and end.
The following diagram demonstrates the flow of processing and the switches
that are used for execution control.
The program for this process, shown below, utilizes the most basic type of
step programming: each step is completed by a unique SNXT(009) that starts
the next step. Each step starts when the switch that indicates the previous
step has been completed turns ON.
SW 1
SW 2
SW 3
SW 4
Solenoid 1
Robot hand
Solenoid 2
Conveyor belt 1
Loading
Conveyor belt 2
Part installation
Conveyor belt 3
Inspection/discharge
Photomicro-
sensor
SW1
SW2
SW3
SW4
Process A
Process B
Process C
Loading
End
Part Installation
Inspection/discharge
Summary of Contents for SYSMAC CS1D-CPU**
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Page 185: ...146 List of Instructions by Function Code Section 2 4...
Page 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Page 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Page 1391: ...1352 ASCII Code Table Appendix A...