Structured Ladder Language; Standard Format - Mitsubishi MELSEC-Q Series Programming Manual

5.2

Structured Ladder Language

The structured ladder language is a graphic language for writing programs using ladder symbols
such as contacts, coils, functions, and function blocks.
Write programs on the assumption that the power is supplied from the baseline at the left edge of
the editor to the connected ladders.
5.2.1

Standard format

Ladder block label
In the structured ladder language, units of ladder blocks are used for programming.
The operation order in a ladder block is from the baseline to the right and from the top to the
bottom.
Contact
Function
Input variables
5.2 Structured Ladder Language
Coil
Function block
Output variables
5.2.1 Standard format
5
5-11