Basic Instructions
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Description
When the NSTL instruction or the NSTP instruction is executed, the process starting with the SSTP
instruction of the specified number is started and executed.
In a step ladder program, a process is identified as being from one SSTP instruction to the next SSTP or
STPE instruction.
Example:
(SSTP 1 )
Y10
(SSTP 2 )
X1
F0 MV, DT 0, DT 100
X0
Process 1
Operations such as the sequence control, selection branch control, parallel branch control are easily
executed.
− Sequence control
Only the necessary processes are switched and executed in order.
Process 1 Process 2 Process 3 Process 4
− Selection branch control
The processes are selected and executed according to conditions.
Process 1
Process 2
Process 3
Process 4
− Parallel branch merge control
Multiple processes are executed simultaneously.
After each process is completed, the next process is executed.
Process 1
Process 2
Process 3
Process 4
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