_VAR PROGRAM PLC_PRG VAR x [...] _VAR xVar1 := NOT GVL [...] _VAR PROGRAM PLC_PRG VAR fb
, AND 或者 NOT 运营商。 例 [...] PLC_PRG VAR i
PROGRAM PLC_PRG VAR i [...] not reparable very
PLC_PRG VAR r [...] not cause an SA