ST Function Block Call Calling a function block in ST Syntax <FB instance>(<FB input variable>:=<value or address>\|, <other FB input variables>); Example 67 . Example TMR:TON; TMR (IN:=%OX5, PT:=T#30

Structured Text and Extended Structured Text (ExST) :

ST Editor The ST editor is a textual editor used for the implementation of code in Structured Text (ST) and Extended Structured Text (ExST). The line numbering is displayed on the left side of the edi

ST Editor in Online Mode In online mode, CODESYS  displays the variables and expressions in the ST editor ( Monitoring of Values ). The writing and forcing of variables and expressions as well as debu

Assignments :

ST Assignment Operator Syntax: <operand> := <expression> This assignment operator executes the same function as the MOVE operator. :

ST Assignment Operator for Outputs The assignment operator => assigns the output of a function, a function block, or a method to a variable. The position on the right side of the operator can also be

ExST Assignment: S= When the operand of the Set assignment switches to TRUE , then TRUE is assigned to the variable to the left of the operator. The variable is set. <variable name> S= <operand name>

ExST Assignment: R= When the operand of the Reset assignment switches to TRUE , then FALSE is assigned to the variable to the left of the operator. The variable is reset. <variable name> R= <operand n

ExST Assignment as An Expression In ExST , as an extension to the IEC 61131-3 standard, CODESYS permits the use of assignments as expressions. Example 57 . Examples int_var1 := int_var2 := int_var3 +