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QJ71C24 R2與E540變頻器進行232通信，QJ發送后變頻器無反應，在電腦上用串口調試工具發送同樣的數據，變頻器動作正常。將QJ的端口連接至電腦端口后用串口調試工具對其發送內容進行檢測后發現并無錯誤，只是獲得的數據并不是一起接收到得。先將串口調試工具獲得的內容粘貼如下：
# Time Function Data ( Hex )
16 [00010541] IRP_MJ_READ Length: 0001, Data: 05
17 [00010541] IRP_MJ_READ Length: 0001, Data: 30
18 [00010541] IRP_MJ_READ Length: 0001, Data: 30
19 [00010541] IRP_MJ_READ Length: 0001, Data: 46
20 [00010541] IRP_MJ_READ Length: 0001, Data: 41
21 [00010541] IRP_MJ_READ Length: 0001, Data: 31
22 [00010541] IRP_MJ_READ Length: 0001, Data: 30
23 [00010541] IRP_MJ_READ Length: 0001, Data: 30
24 [00010541] IRP_MJ_READ Length: 0001, Data: 37
25 [00010541] IRP_MJ_READ Length: 0001, Data: 38
26 [00010542] IRP_MJ_READ Length: 0001, Data: 0D
27 [00010543] IRP_MJ_READ Length: 0001, Data: 0A
注：以上是串口調試工具獲得QJ發送的數據記錄，這個是變頻停止指令（用串口調試工具讓變頻器先運轉起來后再用此指令），即使是變頻器運行指令，變頻器也無反應。為什么接收來的數據時這個樣子呢？？而不是一個長度為12的數據呢？？
138 [00003133] IRP_MJ_WRITE Length: 0012, Data: 05 30 30 46 41 31 30 32 37 41 0D 0A
139 [00003136] IRP_MJ_READ Length: 0003, Data: 06 30 30
140 [00004015] IRP_MJ_WRITE Length: 0012, Data: 05 30 30 46 41 31 30 30 37 38 0D 0A
141 [00004018] IRP_MJ_READ Length: 0003, Data: 06 30 30
142 [00007181] IRP_MJ_WRITE Length: 0012, Data: 05 30 30 46 41 31 30 32 37 41 0D 0A
143 [00007184] IRP_MJ_READ Length: 0003, Data: 06 30 30
注：以上是有串口調試工具向E540發送同樣的數據 E540動作正常
通信設置 9600、8、 Even 、2。 QJ（SW3:05DE SW4:0006）、 E540(0號站 9600、8、even、2、CRLF結束符、通信次數為9999 )、串口調試工具均設置無誤

根據您提供的信息，變頻器不運轉是由于發送的數據沒有連續造成的，可能還是由于程序方面導致的，建議您最好來電咨詢，謝謝。

格式化存儲器后，寫入說明書的示例程序，發現數據還是不連續
后將數據線接線方式改變后，數據依舊不連續，但是有差別顯現
'46 78短接后接受數據如下
6 [00000452] IRP_MJ_READ Length: 0001, Data: 05
7 [00000453] IRP_MJ_READ Length: 0002, Data: 30 31
8 [00000453] IRP_MJ_READ Length: 0002, Data: 46 41
9 [00000453] IRP_MJ_READ Length: 0001, Data: 31
10 [00000453] IRP_MJ_READ Length: 0001, Data: 30
11 [00000454] IRP_MJ_READ Length: 0003, Data: 32 37 42
12 [00002779] IRP_MJ_READ Length: 0002, Data: 05 30
13 [00002779] IRP_MJ_READ Length: 0003, Data: 31 46 41
14 [00002779] IRP_MJ_READ Length: 0003, Data: 31 30 32
15 [00002780] IRP_MJ_READ Length: 0002, Data: 37 42
'將46連接 78短接 后數據接受如下
16 [00006247] IRP_MJ_READ Length: 0001, Data: 05
17 [00006247] IRP_MJ_READ Length: 0001, Data: 30
18 [00006247] IRP_MJ_READ Length: 0001, Data: 31
19 [00006247] IRP_MJ_READ Length: 0001, Data: 46
20 [00006247] IRP_MJ_READ Length: 0001, Data: 41
21 [00006248] IRP_MJ_READ Length: 0001, Data: 31
22 [00006248] IRP_MJ_READ Length: 0001, Data: 30
23 [00006248] IRP_MJ_READ Length: 0001, Data: 32
24 [00006248] IRP_MJ_READ Length: 0001, Data: 37
25 [00006248] IRP_MJ_READ Length: 0001, Data: 42
'將78連接 46短接 后數據如下
26 [00026148] IRP_MJ_READ Length: 0004, Data: 05 30 31 46
27 [00026148] IRP_MJ_READ Length: 0003, Data: 41 31 30
28 [00026149] IRP_MJ_READ Length: 0003, Data: 32 37 42
29 [00030555] IRP_MJ_READ Length: 0001, Data: 05
30 [00030555] IRP_MJ_READ Length: 0003, Data: 30 31 46
31 [00030555] IRP_MJ_READ Length: 0001, Data: 41
32 [00030555] IRP_MJ_READ Length: 0003, Data: 31 30 32
33 [00030556] IRP_MJ_READ Length: 0001, Data: 37
34 [00030556] IRP_MJ_READ Length: 0001, Data: 42
35 [00030661] IRP_MJ_READ Length: 0001, Data: 05
36 [00030661] IRP_MJ_READ Length: 0004, Data: 30 31 46 41
37 [00030662] IRP_MJ_READ Length: 0004, Data: 31 30 32 37
38 [00030663] IRP_MJ_READ Length: 0001, Data: 42

232接線方式為2、3交叉，4、6交叉，5直連，7、8短接。建議您還是來電咨詢，核對相關程序，謝謝。