Mitsubishi MELSEC-L series Programming Manual page 44

Chapter 5 provides detailed explanation on each instruction in the layout as shown below.
Indicates a section number and an outline of an instruction.
Indicates an instruction to be explained.
Indicates the instruction execution target module.
If one instruction is to be executed in two or more modules, applicable modules are indicated
using icons.
Indicates the instruction name and executing condition of the instruction.
Executing condition
Symbols on the
corresponding page
Indicates the instruction names that can be described.
Indicates the description format of the instruction in the structured ladder and ST languages.
4-2
Non-conditional Executed
execution while ON
No symbol
Executed Executed
once at ON while OFF
Executed
once at OFF