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三菱變頻器 E540
現(xiàn)在通訊設(shè)置沒有問題（9600 E 2） 但是問題是 傳送的數(shù)據(jù)不連續(xù)（有時候會連續(xù)） 造成變頻器沒有響應(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)在的問題就是有時候是連續(xù)的 有時候不是 不知問題所在
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)

給技術(shù)支持打電話 用了下他們推薦的串口調(diào)試工具 結(jié)果發(fā)現(xiàn)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  
沒有時間 和每一次的數(shù)據(jù)長度

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(shù)據(jù)
還是有時連續(xù)有時不連續(xù)

變頻器參數(shù)Pr77=2

用串口調(diào)試工具發(fā)送同樣的數(shù)據(jù) 只要是連續(xù)的10位 都好使 即使在變頻器運行的時候
PR77=2的時候 變頻器就可以接受不連續(xù)的數(shù)據(jù) 是這樣的么 ？？？

PR77=2的時候，不管在運行還是在停止大部分地址都能讀寫數(shù)據(jù)。

現(xiàn)在的問題是 怎樣能讓SCU發(fā)送的數(shù)據(jù)連續(xù) 也就是每次的數(shù)據(jù)長度變成10

按你貼出的數(shù)據(jù)分析：發(fā)送是連續(xù)的，至少變頻器認為是連續(xù)的。只是你的協(xié)議還有點問題：通信等待時間的數(shù)據(jù)沒有

按三菱的協(xié)議分析十組數(shù)據(jù)也不對：回車數(shù)據(jù)你也沒有

其實很簡單，要多做點實驗。我剛做幾個項目用的是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(shù)據(jù)分析：發(fā)送是連續(xù)的，至少變頻器認為是連續(xù)的。只是你的協(xié)議還有點問題：通信等待時間的數(shù)據(jù)沒有

你錯了  我的發(fā)送的10個數(shù)據(jù)要連續(xù)發(fā)送的  現(xiàn)在并沒有實現(xiàn)(變頻器要是認為是連續(xù)的話估計就有反應(yīng)了） 數(shù)據(jù)長度有的還不是10  正因為每一次發(fā)送的數(shù)據(jù)長度不是10 所以變頻器沒有反應(yīng) 用串口調(diào)試工具發(fā)送連續(xù)的同樣的10個數(shù)據(jù) 變頻器就有反應(yīng) 還有 關(guān)于沒有CR/LF 在參數(shù)里面是可以設(shè)置的  關(guān)于通訊時間 通訊數(shù)據(jù)是可以不要求設(shè)置的 變頻器里面設(shè)置的是9999

不管誰對誰錯，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(shù)據(jù)，對方才會理會你。
按你的數(shù)據(jù)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(shù)據(jù)給變頻器，如果變頻器設(shè)置是對的話，RUN的燈就會閃動：
05 30 31 46 41 31 30  32 37 42 0D