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三菱變頻器 E540
現(xiàn)在通訊設(shè)置沒(méi)有問(wèn)題（9600 E 2） 但是問(wèn)題是 傳送的數(shù)據(jù)不連續(xù)（有時(shí)候會(huì)連續(xù)） 造成變頻器沒(méi)有響應(yīng)
用串口捕捉工具看了下模塊所發(fā)送的數(shù)據(jù) 如下 ：
#       Time        Function                        Data ( Hex )    

1       [00000000]  IRP_MJ_CREATE                   Port Opened - AccessPort.exe
2       [00000000]  IOCTL_SERIAL_SET_BAUD_RATE      Baud Rate: 9600

8       [00002544]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
9       [00002694]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
10      [00002784]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
11      [00002841]  IRP_MJ_READ                     Length: 0006, Data: 05 30 31 46 41 31
12      [00002842]  IRP_MJ_READ                     Length: 0004, Data: 30 32 37 42
13      [00002901]  IRP_MJ_READ                     Length: 0004, Data: 05 30 31 46
14      [00002902]  IRP_MJ_READ                     Length: 0006, Data: 41 31 30 32 37 42
15      [00002949]  IRP_MJ_READ                     Length: 0005, Data: 05 30 31 46 41
16      [00002950]  IRP_MJ_READ                     Length: 0005, Data: 31 30 32 37 42
17      [00003001]  IRP_MJ_READ                     Length: 0008, Data: 05 30 31 46 41 31 30 32
18      [00003002]  IRP_MJ_READ                     Length: 0002, Data: 37 42
19      [00003047]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
20      [00003094]  IRP_MJ_READ                     Length: 0001, Data: 05
21      [00003095]  IRP_MJ_READ                     Length: 0009, Data: 30 31 46 41 31 30 32 37 42

Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42  這樣的數(shù)據(jù)時(shí)正確的 變頻器能有響應(yīng) 也就是10位的數(shù)據(jù)要一起發(fā)送才可以的

現(xiàn)在的問(wèn)題就是有時(shí)候是連續(xù)的 有時(shí)候不是 不知問(wèn)題所在
PLC程序只有兩段 一段是數(shù)據(jù)傳送到數(shù)據(jù)區(qū) 第二段入附圖所示
不知是不是每一次通訊完成后都要清空一下SCU呢？？？（注 對(duì)協(xié)議宏和該模塊還不是很了解 所以有此想法 ）
附圖 PLC程序 和 協(xié)議宏

期待高人出現(xiàn)

其實(shí)很簡(jiǎn)單，要多做點(diǎn)實(shí)驗(yàn)。我剛做幾個(gè)項(xiàng)目用的是scu-41