APPENDIX A DESCRIPTION OF SPD CHART
1. Sequential processing
Sequential processing executes processing from top to bottom in the sequence in which processing appears.
• SPD chart
Processing 1
Processing 2
2. Conditional branch: 2 branch (IF)
Processing contents are selected according to the condition specified by IF is true or false (THEN/ELSE).
• SPD chart
(IF: condition)
[THEN]
Processing 1
[ELSE]
Processing 2
Example 1. Identification of positive or negative of X
(IF: X > 0)
[THEN]
X is positive number
[ELSE]
X is 0 or negative number
2. STOP if signal is red
(IF: signal = red)
[THEN]
STOP
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