Chapter 6 Instructions; How To Read The Instruction List - Mitsubishi MELSEC-Q series Programming Manual

CHAPTER 6
6.1

How to Read the Instruction List

Process control instructions are classified into six categories: I/O control instructions, control operation instructions,
compensation operation instructions, arithmetic operation instructions, comparison operation instructions, and auto tuning
instructions.
I/O control
instruction
1)
1) Instructions are classified by their application.
2) An instruction symbol used in the program
3) A written format in the ladder diagram
Destination: Shows the destination of the data after operation.
Source: Stores the data before the operation.
4) A written format in the structured ladder/FBD
38
INSTRUCTIONS
2) 3) 4)
S.OUT2 S1 D1 S2 D2
Inputs the execution
condition of an
instruction.
Shows the source side.
5) 6)
Shows the destination side.
Shows the source side.
Shows the instruction symbol.
Shows the instruction symbol.
Outputs an
S_OUT2
execution status.
EN ENO
S1 d1
S2 d2
Shows the destination side.
7) 8)