{"id":173,"date":"2019-07-25T16:40:51","date_gmt":"2019-07-25T08:40:51","guid":{"rendered":"http:\/\/limitironbox.myds.me\/wordpress\/?p=173"},"modified":"2020-05-22T16:25:00","modified_gmt":"2020-05-22T08:25:00","slug":"modbus-tcp-%e9%80%9a%e8%a8%8a%e5%8d%94%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/limitironbox.myds.me\/wordpress\/modbus-tcp-%e9%80%9a%e8%a8%8a%e5%8d%94%e5%ae%9a\/","title":{"rendered":"Modbus TCP \u901a\u8a0a\u5354\u5b9a"},"content":{"rendered":"

Modbus \u85c9\u7531\u4e59\u592a\u7db2\u8def TCP\/IP \u7684\u65b9\u5f0f\u4f86\u9032\u884c\u50b3\u905e\u8cc7\u6599\uff0c\u53eb\u505a\u00a0Modbus TCP<\/p>\n

\u6b64\u7a2e\u901a\u8a0a\u683c\u5f0f\u4e0d\u9700\u8981\u8a08\u7b97CRC\uff0c\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\u4f7f\u7528\u8b58\u5225\u78bc\u7684\u65b9\u5f0f\u4f86\u9032\u884c\u8cc7\u6599\u9a57\u8b49\u3002<\/p>\n

\u5728\u5b78\u7fd2 Modbus\u5354\u5b9a\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u5148\u4e86\u89e3\u6bcf\u4e00\u500bByte\u5404\u4ee3\u8868\u7684\u610f\u601d\u70ba\u4f55<\/p>\n

\u4ee5\u4e0b\u70ba Modbus TCP request \u7684\u5c01\u5305\u683c\u5f0f\uff1a<\/p>\n\n\n\n\n
TCP Header<\/td>\nAddress<\/td>\nFunction Code<\/td>\nStart register addr<\/td>\ndata<\/td>\n<\/tr>\n
6bytes<\/td>\n1byte<\/td>\n1byte<\/td>\n2byte<\/td>\nN bytes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
TCP Header<\/strong><\/div>\n

\u5176\u4e2d\u6211\u5011\u6703\u767c\u73fe\u00a0TCP Header<\/strong>\u00a0\u4e00\u5171\u4f54\u4e866Byte<\/strong>\u3002<\/p>\n

\u90196\u500bByte\u4e3b\u8981\u662f\u7531\u4e09\u500b\u6b04\u4f4d\u6240\u7d44\u6210\uff0c\u6bcf\u4e00\u500b\u6b04\u4f4d\u90fd\u4f542Byte<\/strong>\u3002<\/p>\n

\u672c\u6b21\u901a\u8a0a\u7684\u8b58\u5225\u78bc\uff08Transaction ID\uff09\uff1a\u6703\u7522\u751f2\u500bByte\u7684\u96a8\u6a5f\u503c\uff0c\u7528\u4f86\u8b58\u5225\u8a72\u6b21\u901a\u8a0a\u3002<\/p>\n

\u901a\u8a0a\u65b9\u5f0f\uff08Protocal ID\uff09\uff1a\u57fa\u672c\u4e0a\u90fd\u662f0\uff0c\u7528\u4f86\u8868\u793a\u63a1\u7528\u54ea\u7a2e\u901a\u8a0a\u5354\u5b9a\u30020\u8868\u793a\u70ba Modbus \/ TCP<\/p>\n

\u8cc7\u6599\u9577\u5ea6\uff08Length\uff09\uff1a\u7528\u4f86\u5b9a\u7fa9\u5f9eAddress\u958b\u59cb ~ data\u6b04\u4f4d\u7d50\u675f\uff0c\u6240\u4f54\u7684\u7e3d\u9577\u5ea6\u70ba\u4f55\u3002<\/p>\n

Address<\/div>\n

\u5171\u4f541Byte\uff0c\u7528\u4f86\u8a18\u9304\u8a72\u6b21\u901a\u8a0a\u8981\u5b58\u53d6\u00a0slave\u7aef\u4f4d\u5740<\/p>\n

Function Code<\/div>\n

\u5171\u4f541Byte\uff0c\u7528\u4f86\u5b9a\u7fa9\u8a72\u6b21\u901a\u8a0a\u662f\u8981\u505a\u54ea\u7a2e\u64cd\u4f5c\u3002<\/p>\n

\u5176\u4e2d\u5e38\u898b\u7684Function Code<\/strong>\u6709\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n

 <\/p>\n

01: \u8b80\u53d6\u7576\u524d digital out status<\/p>\n

02: \u8b80\u53d6\u7576\u524d digital input status<\/p>\n

03: \u8b80\u53d6\u7576\u524d analog out status<\/p>\n

04: \u8b80\u53d6\u7576\u524d analog input status<\/p>\n

05: \u5beb\u5165\u55ae\u500b\u00a0\u00a0digital out value<\/p>\n

06: \u5beb\u5165\u55ae\u500b\u00a0\u00a0analog out value<\/p>\n

15: \u5beb\u5165\u591a\u500b\u00a0\u00a0digital out value<\/p>\n

16: \u5beb\u5165\u591a\u500b\u00a0\u00a0analog out value<\/p>\n

Start register addr<\/div>\n

\u5171\u4f542Byte\uff0c\u7528\u4f86\u5b9a\u7fa9\u66ab\u5b58\u5668\u8d77\u59cb\u4f4d\u5740<\/p>\n

data<\/div>\n

\u9577\u5ea6\u70ba\u975e\u56fa\u5b9a\uff0c\u7531\u50b3\u9001\u7684\u8cc7\u6599\u9577\u5ea6\u800c\u5b9a\u3002<\/p>\n

 <\/p>\n

\u4ee5\u4e0a\u70ba\u6bcf\u4e00\u500b\u6b04\u4f4d\u7684\u89e3\u8aaa\uff0c\u63a5\u4e0b\u4f86\u7b46\u8005\u64f7\u53d6\u4e86\u4e00\u5f35\u5f9eWireShark\u6240\u5074\u9304\u5230\u7684 Modbus\u5c01\u5305\u4f86\u505a\u89e3\u8aaa\u3002<\/p>\n

<\/p>\n

\u4e0a\u5716\u70ba\uff0c \u7531WireShark\u6240\u5074\u9304\u5230\u7684Modbus\u5c01\u5305\uff0c\u7528\u4f86\u958b\u555fLED\u6307\u793a\u71c8\u7684\u63a7\u5236\u4ee3\u78bc\u3002<\/p>\n

\u5f9eac\u958b\u59cb\u5230 01\u7d50\u675f\u662f\u6574\u500bModbus\u7684\u5c01\u5305\u5167\u5bb9\u3002<\/p>\n

\u5c01\u5305\u5167\u5bb9\u5982\u4e0b\uff1aac 70 00 00 00 06 58 06 00 c8 00 01<\/code><\/p>\n

\u5176\u4e2d\u6211\u5011\u525b\u525b\u6709\u8aaa\u5230\uff0cModbus\u7684Header \u5171\u4f54 6Byte\b\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n

\u672c\u6b21\u901a\u8a0a\u7684\u8b58\u5225\u78bc\uff08Transaction ID\uff09\uff1aac 70<\/code><\/p>\n

\u901a\u8a0a\u65b9\u5f0f\uff08Protocal ID\uff09\uff1a00 00<\/code><\/p>\n

\u8cc7\u6599\u9577\u5ea6\uff08Length\uff09\uff1a00 06<\/code>\u00a0\u5176\u4e2d\u00a006\u4ee3\u8868\u63a5\u4e0b\u4f86\u4e00\u5171\u6709 6Byte\u7684\u5c01\u5305\u5167\u5bb9<\/p>\n

\u4e0a\u8ff0\u7684\u4e09\u500b\u6b04\u4f4d\u5747\u70baModbus\u7684Header\uff0c\u6bcf\u4e00\u500b\u90fd\u4f542Byte\uff0c\u5171\u4f546Byte\u3002<\/p>\n

slave\u7aef\u4f4d\u5740\uff08Address\uff09\uff1a58\u00a0<\/code><\/p>\n

\u64cd\u4f5c\u78bc\uff08Function Code\uff09\uff1a06<\/code>\u00a0\u4ee3\u8868\u5beb\u5165\u55ae\u4e00\u6578\u503c<\/p>\n

\u66ab\u5b58\u5668\u8d77\u59cb\u4f4d\u5740\uff08Start register addr\uff09\uff1a00 c8\u00a0<\/code><\/p>\n

\u50b3\u9001\u8cc7\u6599\uff08Data\uff09\uff1a\u00a000 01<\/code><\/p>\n

\u6700\u5f8c\uff0c\u9644\u4e0a\u4e00\u5f35Modbus\u63a7\u5236\u7684\u8868\u683c\u4f86\u505a\u500b\u7d50\u675f\u3002<\/p>\n

\u64cd\u4f5c\u78bc 06: \u5beb\u5165LED\u958b\u71c8\u8cc7\u8a0a<\/p>\n\n\n\n\n
Transaction ID<\/td>\nProtocal ID<\/td>\nLength<\/td>\nAddress<\/td>\nFunction Code<\/td>\nStart register addr<\/td>\nData<\/td>\n<\/tr>\n
ac 70<\/code><\/td>\n00 00<\/code><\/td>\n00 06<\/code><\/td>\n58<\/code><\/td>\n06<\/code><\/td>\n00 c8<\/code><\/td>\n00 01<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u610f\u601d\u70ba\uff1aMaster\u8981\u6c42\u5beb\u5165\u8cc7\u6599\u5230\u88dd\u7f6e\u4f4d\u574058\u7684\u66ab\u5b58\u5668\u4f4d\u5740 00c8\uff0c\u5beb\u5165\u7684\u8cc7\u8a0a\u70ba 00 01\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Modbus \u85c9\u7531\u4e59\u592a\u7db2\u8def TCP\/IP…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pmpro_default_level":""},"categories":[25],"tags":[],"_links":{"self":[{"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/173"}],"collection":[{"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/comments?post=173"}],"version-history":[{"count":1,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/173\/revisions"}],"predecessor-version":[{"id":174,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/173\/revisions\/174"}],"wp:attachment":[{"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/media?parent=173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/categories?post=173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/limitironbox.myds.me\/wordpress\/wp-json\/wp\/v2\/tags?post=173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}