Appendix a expression, Appendix a, Expression – Yaskawa MP900 Series Machine Controller New Ladder Editor User Manual

Page 239

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A-1

A

Appendix A

Expression

It is necessary to describe the conditional expression and the operational
expression in IF, WHILE, and the EXPRESSION instruction in the ladder
instruction. Those expressions can be described by using "Expression".
This appendix describes the use rule of the Expression.

A.1 Expression - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-2

A.1.1 Operator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-2
A.1.2 Operand - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-4
A.1.3 Instructions Available in EXPRESSION Instruction - - - - - - - - - - - - - - A-5

A.2 Recognizable Expression - - - - - - - - - - - - - - - - - - - - - - - - -A-6

A.2.1 Arithmetic Operator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-6
A.2.2 Comparison Operator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-6
A.2.3 Logic Operator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-6
A.2.4 Substitution Operator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-7
A.2.5 Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-7
A.2.6 Others - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-7

A.3 Application to Ladder Program - - - - - - - - - - - - - - - - - - - - - -A-9

A.3.1 Conditional Expression of IF Instruction - - - - - - - - - - - - - - - - - - - - - - A-9
A.3.2 Conditional Expression of WHILE Instruction - - - - - - - - - - - - - - - - - - A-9
A.3.3 Operational Expression of EXPRESSION Instruction - - - - - - - - - - - A-10

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