示例: PROGRAM PLC_PRG VAR END
. 错误示例: PROGRAM PLC
432 . 错误示例: PROGRAM
示例: PROGRAM PLC_PRG VAR
333 . 错误示例: PROGRAM
351 . 错误示例: PROGRAM
352 . 错误示例: PROGRAM
_STRING : PROGRAM PLC_PRG VAR i