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三菱變頻器 E540
現在通訊設置沒(méi)有問(wèn)題（9600 E 2） 但是問(wèn)題是 傳送的數據不連續（有時(shí)候會(huì )連續） 造成變頻器沒(méi)有響應
用串口捕捉工具看了下模塊所發(fā)送的數據 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  這樣的數據時(shí)正確的 變頻器能有響應 也就是10位的數據要一起發(fā)送才可以的

現在的問(wèn)題就是有時(shí)候是連續的 有時(shí)候不是 不知問(wèn)題所在
PLC程序只有兩段 一段是數據傳送到數據區 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

給技術(shù)支持打電話(huà) 用了下他們推薦的串口調試工具 結果發(fā)現是這樣的
\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B\ENQ01FA1027B05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42 05 30 31 46 41 31 30 32 37 42  
沒(méi)有時(shí)間 和每一次的數據長(cháng)度

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
22      [00003139]  IRP_MJ_READ                     Length: 0009, Data: 05 30 31 46 41 31 30 32 37
23      [00003140]  IRP_MJ_READ                     Length: 0001, Data: 42
24      [00003183]  IRP_MJ_READ                     Length: 0009, Data: 05 30 31 46 41 31 30 32 37
25      [00003184]  IRP_MJ_READ                     Length: 0001, Data: 42
26      [00003225]  IRP_MJ_READ                     Length: 0006, Data: 05 30 31 46 41 31
27      [00003226]  IRP_MJ_READ                     Length: 0004, Data: 30 32 37 42
28      [00003265]  IRP_MJ_READ                     Length: 0002, Data: 05 30
29      [00003266]  IRP_MJ_READ                     Length: 0008, Data: 31 46 41 31 30 32 37 42
30      [00003306]  IRP_MJ_READ                     Length: 0009, Data: 05 30 31 46 41 31 30 32 37
31      [00003307]  IRP_MJ_READ                     Length: 0001, Data: 42
32      [00003344]  IRP_MJ_READ                     Length: 0004, Data: 05 30 31 46
33      [00003345]  IRP_MJ_READ                     Length: 0006, Data: 41 31 30 32 37 42
34      [00003385]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
35      [00003454]  IRP_MJ_READ                     Length: 0005, Data: 05 30 31 46 41
36      [00003455]  IRP_MJ_READ                     Length: 0005, Data: 31 30 32 37 42
37      [00003805]  IRP_MJ_READ                     Length: 0003, Data: 05 30 31
38      [00003806]  IRP_MJ_READ                     Length: 0007, Data: 46 41 31 30 32 37 42
39      [00003886]  IRP_MJ_READ                     Length: 0005, Data: 05 30 31 46 41
40      [00003887]  IRP_MJ_READ                     Length: 0005, Data: 31 30 32 37 42
41      [00003936]  IRP_MJ_READ                     Length: 0008, Data: 05 30 31 46 41 31 30 32
42      [00003937]  IRP_MJ_READ                     Length: 0002, Data: 37 42
43      [00003984]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
44      [00004032]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
45      [00004076]  IRP_MJ_READ                     Length: 0009, Data: 05 30 31 46 41 31 30 32 37
46      [00004077]  IRP_MJ_READ                     Length: 0001, Data: 42
47      [00004379]  IRP_MJ_READ                     Length: 0008, Data: 05 30 31 46 41 31 30 32
48      [00004380]  IRP_MJ_READ                     Length: 0002, Data: 37 42
49      [00005067]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42
50      [00005744]  IRP_MJ_READ                     Length: 0005, Data: 05 30 31 46 41
51      [00005745]  IRP_MJ_READ                     Length: 0005, Data: 31 30 32 37 42
52      [00006516]  IRP_MJ_READ                     Length: 0008, Data: 05 30 31 46 41 31 30 32
53      [00006518]  IRP_MJ_READ                     Length: 0002, Data: 37 42
54      [00006595]  IRP_MJ_READ                     Length: 0010, Data: 05 30 31 46 41 31 30 32 37 42

多次試驗后的數據
還是有時(shí)連續有時(shí)不連續

變頻器參數Pr77=2

用串口調試工具發(fā)送同樣的數據 只要是連續的10位 都好使 即使在變頻器運行的時(shí)候
PR77=2的時(shí)候 變頻器就可以接受不連續的數據 是這樣的么 ？？？

PR77=2的時(shí)候，不管在運行還是在停止大部分地址都能讀寫(xiě)數據。

現在的問(wèn)題是 怎樣能讓SCU發(fā)送的數據連續 也就是每次的數據長(cháng)度變成10

按你貼出的數據分析：發(fā)送是連續的，至少變頻器認為是連續的。只是你的協(xié)議還有點(diǎn)問(wèn)題：通信等待時(shí)間的數據沒(méi)有

按三菱的協(xié)議分析十組數據也不對：回車(chē)數據你也沒(méi)有

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

引用

引用第7樓hlq_0815于2011-07-14 09:31發(fā)表的 SCU21 232串口和變頻器通訊 :
按你貼出的數據分析：發(fā)送是連續的，至少變頻器認為是連續的。只是你的協(xié)議還有點(diǎn)問(wèn)題：通信等待時(shí)間的數據沒(méi)有

你錯了  我的發(fā)送的10個(gè)數據要連續發(fā)送的  現在并沒(méi)有實(shí)現(變頻器要是認為是連續的話(huà)估計就有反應了） 數據長(cháng)度有的還不是10  正因為每一次發(fā)送的數據長(cháng)度不是10 所以變頻器沒(méi)有反應 用串口調試工具發(fā)送連續的同樣的10個(gè)數據 變頻器就有反應 還有 關(guān)于沒(méi)有CR/LF 在參數里面是可以設置的  關(guān)于通訊時(shí)間 通訊數據是可以不要求設置的 變頻器里面設置的是9999

不管誰(shuí)對誰(shuí)錯，首先你要弄清什么是“協(xié)議”。搞通信你必須按照對方的協(xié)議給它數據，對方才會(huì )理會(huì )你。
按你的數據分析，你給對方的指令是“FA ”運行指令。。。。。。
你試試發(fā)以下這組數據給變頻器，如果變頻器設置是對的話(huà)，RUN的燈就會(huì )閃動(dòng)：
05 30 31 46 41 31 30  32 37 42 0D