====== Keywords ======

Keywords are unique character combinations used as individual syntactic elements. Uppercase/lowercase does not matter. Keywords must not be used as any kind of user names.

Reserved keywords are:

  * names of [[:en:mervis-ide:35-help:035-software_basic:035-data-types:005-elementary_data_types|elementary data types]]
  * names of [[:en:mervis-ide:35-help:035-software_basic:045-pou:010-standard_function|standard functions]]
  * names of [[:en:mervis-ide:35-help:035-software_basic:045-pou:020-standard_function_block|standard function blocks]]
  * names of input parameters of [[:en:mervis-ide:35-help:035-software_basic:045-pou:010-standard_function|standardfunctions]]
  * names of input and output parameters of [[:en:mervis-ide:35-help:035-software_basic:045-pou:020-standard_function_block|standard function blocks]]

Examples:

<code st-iec>
FOR, for, FALSE, TRUE, TIME#, BOOL, INT, AT, VAR, RETAIN, CONSTANT, FUNCTION, END_FUNCTION, FUNCTION_BLOCK, PROGRAM
</code>