Structured Text

logiccloud adheres to the IEC 61131-3 standard for programming languages. This means that you can use Structured Text (ST) to program your logiccloud projects. In this section we will give you an overview of how to use IEC 61131-3 Structured text, what the different elements are, and how to use them in logiccloud. Additionally, any logiccloud-specific features will be explained here.

📄️ Supported ST syntax

logiccloud supports the following ST syntax according to IEC standard:

📄️ Variables

Variables are declared in one of the variable sections. A variable can be declared with

📄️ Data types

A data type is a classification that defines for literals and variables the possible values, the operations that can be performed, and the way the values are stored.

📄️ Basic elements

Expressions

📄️ Command groups

The following command groups are the basic constructs of Structured Text and can be flexibly combined and nested.

📄️ Functions

Programs are created in logiccloud via the project tree. Within the node POUs you can create a new function. To do this, right-click or go to the icon with the three dots and select Add POU*, assign a name, select as type Function and as language Structured Text (ST). The structure is created automatically.

📄️ Function blocks

Function blocks are created in logiccloud via the project tree. Within the node POUs you can create a new function block. To do this, right-click or go to the icon with the three dots and select Add POU, assign a name, select as type Function block and as Language Structured Text (ST). The structure is created automatically.

📄️ Programs

Programs are created in logiccloud via the project tree. Within the node POUs you can create a new program. To do this, right-click or go to the icon with the three dots and select Add POU*, assign a name, select as type Program and as Language Structured Text (ST). The structure is created automatically.