Write keywords in uppercase letters in the editors.
The following strings are reserved as keywords. They cannot be used as identifiers for variables or POUs:
o-
o&
o(
o)
o*
o,
o.
o..
o/
o:
o:=
o;
o[
o]
o^
o__CATCH
o__CHECKLICENSE
o__CHECKLICENSEBIT
o__DELETE
o__ENDTRY
o__FINALLY
o__ISVALIDREF
o__MEMORYBARRIER
o__NEW
o__QUERYINTERFACE
o__QUERYPOINTER
o__THROW
o__TRY
o__XADO
oΙ
o+
o<
o<=
o<>
o=
o>=
o>
o=>
oABS
oACOS
oADR
oAND
oAND_THEN
oASIN
oATAN
oBITADR
oBY
oCASE
oCONTINUE
oCOS
oDO
oELSE
oELSIF
oEND_CASE
oEND_FOR
oEND_IF
oEND_REPEAT
oEND_WHILE
oEXIT
oEXP
oEXPT
oFALSE
oFOR
oIF
oINI
oLIMIT
oLN
oLOG
oLOWER_BOUND
oMAX
oMIN
oMOD
oMOVE
oMUX
oNOT
oOR
oOR_ELSE
oR=
oREF=
oREPEAT
oRETURN
oROL
oROR
oS=
oSEL
oSHL
oSHR
oSIN
oSIZEOF
oSQRT
oSUPER
oTAN
oTHEN
oTHIS
oTO
oTRUE
oTRUNC
oTRUNC_INT
oUNTIL
oUPPER_BOUND
oWHILE
oXOR
Additionally, the conversion operators as listed in the Input Assistant are handled as keywords.