_BLOCK POU VAR_IN_OUT [...] OF INT; END_VAR VAR [...] ; test2: DINT; END_VAR

_INPUT VAR_INST VAR_IN_OUT [...] _INST VAR_IN_OUT VAR [...] variable *) END_VAR VAR_IN_OUT

objects can have a VAR_IN_OUT [...] is not case sensitive. VAR_IN_OUT [...] described here with VAR_IN_OUT

_MyB VAR_INPUT iInB : [...] _OUTPUT iOutB : INT; END_VAR [...] TRUE, iOutB => iVar

Message EXTENDS CBM.ETRIG VAR_IN_OUT [...] [0..63] OF BYTE; END_VAR VAR [...] Validity: TIME := t#1s; END_VAR

such as VAR_IN_OUT [...] but not as VAR_IN_OUT . : [...] for scopes VAR

_BLOCK locio VAR xLocIn [...] _CONFIG PLC_PRG.locioVar1.xLocIn AT %IX1.0 : BOOL; PLC_PRG.locioVar1.xLocOut

DownloadDone : DWORD VAR_IN_OUT [...] DownloadDone : DWORD VAR_IN_OUT [...] to all variables (in all global

( VAR_IN_OUT ) [...] ) Internal ( VAR ) Output variable ( VAR_OUTPUT )

VAR_IN_OUT | VAR [...] in the declaration section VAR [...] PersistentVars VAR