Updating Library Placeholders If a project uses placeholder libraries, then it can happen that the placeholders can no longer be resolved automatically when they are loaded later. As a result, the loa

Managing Devices CODESYS manages the installed devices in the device repository . A device repository is a defined location in the file system which by default is defined as the system repository for

Operator: __TRY, __CATCH, __FINALLY, __ENDTRY These operators are extended from the IEC 61131-3 standard and they are used for specific exception handling in IEC code. Syntax __TRY <statements_try> __

Operator: __CURRENTTASK The operator is an extension of the IEC 61131-3 standard. At runtime, the operator provides information about the IEC task that is currently running. Tip The operator is suppor

Operator: __COMPARE_AND_SWAP The multicore operator is an extension of the IEC 61131-3 standard. The operator can be used for implementing a semaphore, for example to guarantee exclusive access to a v

Operator: __XADD The multicore operator is an extension of the IEC 61131-3 standard. The operator can be used for implementing an atomic counter. If an integer variable is incremented by means of ordi

Operator: __POSITION The operator is an extension of the IEC 61131-1 standard. At runtime, the operator yields the position of a variable in the declaration part or in the implementation part of a POU

String Constants A string constant is a string enclosed in single straight quotation marks. The characters are coded according to the character set specified in ISO/IEC 8859-1. Therefore, a string con

Constant: UTF8# String With compiler version >= 3.5.18.0, UTF-8 encoded string literals are possible as a single-byte string with base STRING . Syntax: UTF8#' <string literal> ' Example 170 . Constant

Constant: Character The character literal for a single Unicode character has the base type UDINT . The type prefix UCHAR# is prefixed to the literal as an identifier. The numerical value of the charac