PLC通过字符串变量反馈故障状态

PROGRAM MAIN VAR intA:INT; strS:STRING; strTemp:string; END_VAR CASE intA OF 1:strTemp:=’Motor’; 2:strTemp:=’Fan’; 3:strTemp:=’VVVF’; 4:strTemp:=’Power’; END_CASE; strS:=CONCAT( ‘intA.Value=’,INT_TO_STRING(intA)); strS:=CONCAT( strs,strTemp);