4字节32位AI值的浮点解析，配置“值类型”的字串
float32		Lo1234Hi===CDAB
sw_float		Lo1234Hi===ABCD
rv_float		Lo1234Hi===DCBA
rv_sw_float	Lo1234Hi===BADC

地址,采集序号,开始,结束,类型,值类型,组号,功能号,时间间隔
1,1,0,31,AI,float,1,3,100
3,2,0,31,AI,sw_float,1,,
5,3,0,31,AI,rv_float,1,,
7,4,0,31,AI,rv_sw_float,1,,
9,5,0,15,AI,uint16,1,,
9,6,0,15,AI,int16,1,,
10,1,0,0,DI,bit,1,,
10,2,1,1,DI,bit,1,,
10,3,2,2,DI,bit,1,,
10,4,3,3,DI,bit,1,,
10,5,4,4,DI,bit,1,,
10,6,5,5,DI,bit,1,,
10,7,6,6,DI,bit,1,,
10,8,7,7,DI,bit,1,,
10,9,8,8,DI,bit,1,,
10,10,9,9,DI,bit,1,,
10,11,10,10,DI,bit,1,,
10,12,11,11,DI,bit,1,,
10,13,12,12,DI,bit,1,,
10,14,13,13,DI,bit,1,,
10,15,14,14,DI,bit,1,,
10,16,15,15,DI,bit,1,,