鎽樿锛�鏈枃涓昏浠嬬垂Modbus RTU瑕�(gu墨)绱�锛屽強鍦╒B6.0绶ㄧ▼鐠�(hu谩n)澧冧笅閫氶亷RS-485涓插彛瀵�(sh铆)鐝�(xi脿n)涓绘帶鑷篜C姗�(j墨)鑸囨櫤鑳藉剙琛ㄩ枔鍩鸿垏瑭茶(gu墨)绱勯€氫俊鐨勫叿楂斿(sh铆)鐝�(xi脿n)鏂规硶銆�
闂�(gu膩n)閸佃锛�Modbus RTU锛涢€氫俊鍗�(xi茅)璀�锛汻S-485锛汣RC鏍¢
1 寮曡█
闅ㄨ憲鏅備唬鐨勯€�(j矛n)姝�锛岃秺渚嗚秺澶氱殑浼佹キ(y猫)闁嬪鍚戠敓鐢�(ch菐n)鍜岀鐞嗚嚜鍕曞寲杞�(zhu菐n)璁�銆傚悇绋櫤鑳藉剙琛ㄤ笉鏂峰湴鎳�(y墨ng)鐢ㄥ埌鐢熺敘(ch菐n)鐢熸椿鐨勫悇鍊嬮牁(l菒ng)鍩�銆傚湪宸ユキ(y猫)鎺у埗鏂归潰锛孯S锛�485绺界窔鐢变簬骞宠 宸垎鍌宠几鐗规€у叿鏈夌殑骞叉摼鎬уソ銆佸偝杓歌窛闆㈤仩(yu菐n) 銆佹湁杓冨ぇ绱氶€h兘鍔涚瓑鐗归粸(di菐n)锛岄潪甯搁仼鍚堜簬绲勬垚宸ユキ(y猫)绱氱殑澶氭(j墨)閫氫俊绯荤当(t菕ng)銆侻odbus RTU瑕�(gu墨)绱勬槸Modicon鍏徃鐨勬敞鍐婂晢妯�(bi膩o)锛屾槸鐩墠鍦嬮殯鏅鸿兘鍖栧剙琛ㄦ櫘閬嶉噰鐢ㄧ殑涓绘祦閫氳▕鍗�(xi茅)璀颁箣涓€銆傚湪鍚勫€嬪伐妤�(y猫)鍎€鍣ㄥ剙琛ㄥぇ閲忎娇鐢ㄧ殑浠婂ぉ锛孧odbus RTU鍗�(xi茅)璀板拰RS-485绺界窔寰楀埌浜嗘渶鐐哄唬娉涚殑鎳�(y墨ng)鐢�銆傛湰鏂囦富瑕佸緸鎳�(y墨ng)鐢ㄧ殑瑙掑害浠嬬垂鍦ㄤ竴鍊嬪伐妤�(y猫)鎺у埗绯荤当(t菕ng)涓紝瀵�(sh铆)鐝�(xi脿n)瑭叉妧琛�(sh霉)鐨勫叿楂旀柟妗�銆�
2 Modbus RTU 閫氳▕鍗�(xi茅)璀扮啊浠�
锛�1锛� Modbus RTU鍗�(xi茅)璀扮啊浠�
Modbus RTU閫氳▕鍗�(xi茅)璀版槸Modicon鍏徃鐨勬敞鍐婂晢妯�(bi膩o)銆傞噰鐢ㄤ富寰炲晱绛旀柟寮忓伐浣�锛屽叾瑕�(gu墨)鑼冨凡鍦ㄥ湅闅涗簰鑱�(li谩n)缍�(w菐ng)涓婂叕甯冿紝鏄洰鍓嶅湅闅涙櫤鑳藉寲鍎€琛ㄦ櫘閬嶉噰鐢ㄧ殑涓绘祦閫氳▕鍗�(xi茅)璀颁箣涓€銆傜洰鍓�锛屽湅鍏�(n猫i)瑷卞鐢熺敘(ch菐n)鍟嗗凡鍦ㄤ粬鍊戠殑鐢�(ch菐n)鍝佸拰绯荤当(t菕ng)涓伒寰┎鍗�(xi茅)璀版(bi膩o)婧�(zh菙n)銆傝┎鍗�(xi茅)璀版湁鍏╃ó鍌宠几妯″紡鍗砇TU妯″紡鍜孉SCII妯″紡銆傚叾涓璕TU妯″紡淇℃伅骞€涓殑8浣嶆暩(sh霉)鎿�(j霉)鍖呮嫭鍏╁€�4浣�16閫�(j矛n)鍒跺瓧绗�锛岀浉灏嶄簬ASCII妯″紡锛孯TU妯″紡琛ㄩ仈(d谩)鐩稿悓鐨勪俊鎭渶瑕佽純灏戠殑浣嶆暩(sh霉)锛屼笖鍦ㄧ浉鍚岄€氳▕閫熺巼涓嬪叿鏈夋洿澶х殑鏁�(sh霉)鎿�(j霉)娴侀噺銆傚洜姝ら€氬父鎯呮硜涓�锛屼竴鑸伐妤�(y猫)鏅鸿兘鍎€鍣ㄥ剙琛ㄩ兘鏄噰鐢≧TU妯″紡鐨凪odbus瑕�(gu墨)绱�銆�
锛�2锛� Modbus 閫氫俊鏍煎紡
鐣�(d膩ng)閫氳▕鍛戒护鐢辩櫦(f膩)閫佽ō(sh猫)鍌欙紙涓婁綅姗�(j墨)锛夌櫦(f膩)閫佽嚦鎺ユ敹瑷�(sh猫)鍌欙紙涓嬩綅姗�(j墨)锛夋檪锛岀鍚堢浉鎳�(y墨ng)鍦板潃纰肩殑涓嬩綅姗�(j墨)灏辨渻闊挎噳(y墨ng)鍛戒护锛屽苟鏍规摎(j霉)绱勫畾鐨勯€氫俊鍗�(xi茅)璀拌畝鍙栦俊鎭�銆佹暩(sh霉)鎿�(j霉)鏍¢骞朵笖鍩�(zh铆)琛岀浉鎳�(y墨ng)鐨勫姛鑳芥搷浣�銆傝繑鍥炵殑骞€绲�(ji茅)妲�(g貌u)鍖呭惈鍦板潃纰笺€佸姛鑳界⒓銆佹暩(sh霉)鎿�(j霉)浠ュ強CRC鏍¢纰�銆�
锛�3锛変笂涓嬩綅姗�(j墨)閫氫俊骞€绱勫畾鏍煎紡
鍏朵腑鐨勫剙琛ㄥ湴鍧€鍦ㄤ娇鐢ㄧ殑闆诲琛ㄤ腑鏄偤涓€鍊嬪瓧绡€(ji茅)瀹氱京鐨�锛屾墍浠ユ渶澶氬埌256鍊�銆備笅浣嶆(j墨)鑸囦笂浣嶆(j墨)鐨勯€氫俊娉㈢壒鐜囦竴鑸彲鑷敱瑷�(sh猫)瀹氾紝浣嗗繀闋堜繚璀変笂涓嬫(j墨)鐨勯€氫俊娉㈢壒鐜囧皪鎳�(y墨ng)鍖归厤銆�
3 涓婁綅姗�(j墨)閫氫俊杌熶欢瑷�(sh猫)瑷堟柟妗�
涓婁綅姗�(j墨)鐨勯€氫俊杌熶欢閲囩敤VB6.0鐨勯枊鐧�(f膩)鐠�(hu谩n)澧�銆傚湪VB6.0涓皪涓插彛閫�(j矛n)琛岀法绋嬪彲浠ヤ娇鐢∕scomm鎺т欢鍔犲揩闁嬬櫦(f膩)閫�(j矛n)搴�銆傝┎鎺т欢涓昏鏄偤RS锛�232鐨勯€氱敤涓插彛鑰岃ō(sh猫)瑷�銆傛墍浠ョ偤浜嗗埄鐢≒C涓婄従(xi脿n)鏈夌殑RS锛�232鎺ュ彛锛岄€氬父鏄娇鐢≧S232/485鐨勮綁(zhu菐n)鎻涘櫒銆傞€欎簺杞�(zhu菐n)鎻涘櫒涓€鑸€氶亷閭忚集闁€闆昏矾鎺у埗RXD銆乀XD鍜孏ND涓夐嚌淇¤櫉锛屽緸鑰岃嚜鍕曞皪鍗婇洐宸ユ垨鍏ㄩ洐宸ョ殑485涓插彛閫�(j矛n)琛屾帶鍒躲€傞€氶亷杞�(zhu菐n)鎻涘櫒锛屾垜鍊戝氨鍙互鍍忛枊鐧�(f膩)閫氱敤鐨凴S锛�232涓插彛涓€妯d締蹇€熼枊鐧�(f膩)鍩轰簬RS锛�485涓插彛鐨勪笂浣嶆(j墨)閫氫俊杌熶欢銆�
锛�1锛夊垵濮嬪寲绋嬪簭瑷�(sh猫)瑷�
鍦ㄥ垵濮嬪寲绋嬪簭涓�锛屼富瑕佹槸瑷�(sh猫)瀹氬ソ鏁村€嬪箑绲�(ji茅)妲�(g貌u)鐨勫懡浠ゆ暩(sh霉)绲�銆佸偝杓告尝鐗圭巼銆佷互鍙婁竴浜涘繀闋堢殑涓插彛鍒濆瑷�(sh猫)瀹�銆傚叿楂旂殑鎿嶄綔濡備笅闈唬纰艰鏄�
Dim Tcommand锛�7锛� As Byte 鈥橀枊杈熷懡浠ゅ箑鐨勫箑闀峰害鏁�(sh霉)绲�
MSComm.CommPort = 1 鈥樿ō(sh猫)瀹氶渶瑕佷娇鐢ㄧ殑涓插彛锛岀暥(d膩ng)鐒堕€欓噷鍙互鐢ㄨ几鍏ユ柟寮忛潏娲昏ō(sh猫)瀹�銆傛毇瀹氱偤1#鍙�
MSComm.Settings="2400,n,8,1" 鈥樿ō(sh猫)瀹氬偝杓�?sh霉)鐗熴剬鑺堝睅鎵橈綊鐏х粸?
MSComm.InBufferSize = 1024 鈥橀枊杈熸暩(sh霉)鎿�(j霉)绶╂矕鍗€(q奴)
MSComm.InputMode =comInputModeBinary 鈥樿ō(sh猫)瀹氱偤浜岄€�(j矛n)鍒剁殑鏁�(sh霉)鎿�(j霉)娴佹柟寮�
MSComm.InputLen = 0 鈥樹竴娆″叏閮ㄨ畝鍏ユ墍闇€瑕佺殑鏁�(sh霉)鎿�(j霉)
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涓婇潰鐨勪唬纰间竴鑸兘鏄覆鍙e垵濮嬪寲蹇呴爤閫�(j矛n)琛岃ō(sh猫)瀹氱殑骞惧€嬮儴鍒�銆傛牴鎿�(j霉)鍊嬩汉闇€瑕佸彲浠ュ湪VB6.0涓仛涓€鍊嬪垵濮嬪寲鐣岄潰锛屽皪鍚勫€嬪弮鏁�(sh霉)锛堝娉㈢壒鐜囥€佷娇鐢ㄤ覆鍙g瓑锛夐€�(j矛n)琛岃嚜鐢辫ō(sh猫)瀹氬拰鏇存敼锛屼互鎻愰珮鍒濆鍖栬ō(sh猫)瀹氱殑闈堟椿鎬у拰閫氱敤鎬�銆�
锛�2锛夊懡浠ゅ瓧鐧�(f膩)閫�
鍛戒护瀛楃櫦(f膩)閫佹噳(y墨ng)瑭插毚(y谩n)鏍兼寜鐓odbus瑕�(gu墨)绱勬墍瑷�(sh猫)瑷堢殑骞€鏍煎紡鍜屼笂涓嬩綅姗�(j墨)鍦ㄨ┎瑕�(gu墨)绱勫熀绀�(ch菙)涓婃墍瀹氱京鐨勯€氫俊鍗�(xi茅)璀�銆傚弮鑰冭〃1鐨勯€氫俊鍗�(xi茅)璀伴爢搴�锛岀法瀵涓嬬殑VB浠g⒓渚嗗(sh铆)鐝�(xi脿n)鍛戒护鐨勭櫦(f膩)閫併€�
Tcommand 锛�0锛� = address 鈥� address鐐鸿ō(sh猫)瀹氱殑鎺ュ彈鍦板潃杓稿叆鐨勮畩閲�
Tcommand 锛�1锛� = Val锛�"&h" + "03"锛�
鈥︹€︼紙鍏朵粬鐨勯€氫俊鍗�(xi茅)璀�锛屽苟瑷堢畻CRC鏍¢浠g⒓锛�
Tcommand 锛�6锛� = CRC锛�1锛�
Tcommand 锛�7锛� = CRC锛�0锛�
frmcontrol.MSComm.Output = Tcommand
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锛�3锛変笂浣嶆(j墨)鎺ユ敹鍜屾暩(sh霉)鎿�(j霉)铏曠悊
鏍规摎(j霉)琛�2鐨勫洖閫侀€氫俊鍗�(xi茅)璀�锛屼笂浣嶆(j墨)瑙f瀽鎵€鎺ュ彈鐨勬暩(sh霉)鎿�(j霉)锛屽苟閫�(j矛n)琛屽繀瑕佺殑铏曠悊銆備竴鑸€岃█寰炰笅浣嶆(j墨)鐧�(f膩)閫佷笂渚嗙殑鏁�(sh霉)鎿�(j霉)閮芥槸鏈変竴瀹氱殑骞€闀峰害銆傜壒鍒ユ槸灏嶄簬涓€浜涘浐鍖栧ソ鐨勬櫤鑳藉剙琛�銆傛墍浠ユ渶濂界殑鏂规硶鏄寜鐓ч€氫俊鍥為€佺殑骞€闀峰害锛屽湪涓婁綅姗�(j墨)绋嬪簭涓垎鍒ラ枊杈熷叐鍊嬪悓妯i暦搴︾殑鏁�(sh霉)绲�銆備竴鍊嬩綔鐐烘帴鍙楁暩(sh霉)绲�锛岀敤渚嗕竴娆℃€ф帴鏀朵覆鍙g珐娌栧崁(q奴)涓殑鏁�(sh霉)鎿�(j霉)锛涘彟涓€鍊嬬偤瀹夊叏鏁�(sh霉)绲�锛岀敤渚嗗京(f霉)鍒舵帴鏀舵暩(sh霉)绲勪腑鐨勬暩(sh霉)鎿�(j霉)骞堕€�(j矛n)琛岃В鏋愩€傞€欐ǎ鍙互鎻愰珮鏁村€嬬郴绲�(t菕ng)鐨勫閷兘鍔�銆�
LoopUntil frmcontrol.MSComm.InBufferCount = 9
InByte = frmcontrol.MSComm.Input
For i = 0 To 锛坈ount - 1锛�
InSafeArray锛坕锛� = InByte锛坕锛�
Next i
鍏朵唬纰间腑鐨刬nbyte锛堬級灏辨槸鎺ユ敹鏁�(sh霉)绲勶紝鑰孖nSafeArray锛堬級灏辨槸鎴戝€戝啀闁嬭緹鐨勫畨鍏ㄦ暩(sh霉)绲�銆�
锛�4锛塁RC鏍¢鐨勫(sh铆)鐝�(xi脿n)鏂规硶
鎸夌収Modbus瑕�(gu墨)绱勭殑鏍¢鏂瑰紡锛孯TU妯″紡鐨勬牎椹楁柟寮忕偤CRC鏍¢鏂瑰紡锛涜€孉SCII妯″紡鐐篖RC鏍¢銆備竴鑸殑鏅鸿兘鍎€琛ㄥ閲囩敤RTU鐨凜RC鏍¢鏂瑰紡銆傛牴鎿�(j霉)鐢熸垚澶氶爡寮忕殑涓嶅悓锛孋RC鏍¢閫氬父鏈変互涓嬪咕绋細CRC锛�12 锛堝偝6bit锛�锛汣RC锛�16锛堢編鍦嬫(bi膩o)婧�(zh菙n)锛屽偝8bit锛夛紱CRC锛岰CITT锛堟瓙娲叉(bi膩o)婧�(zh菙n)锛屽偝8bit锛夛紱CRC锛�32锛坧oint-to锛峱oint鍚屾鍌宠几涓娇鐢級 銆傜洰鍓嶅剙琛ㄩ姣旇純鏅亶鐨勬槸CRC锛�16鐨勬牎椹楃⒓銆傚叾鐢熸垚澶氶爡寮忕偤X16+X15+X2+1銆傚湪绠楁硶瀵�(sh铆)鐝�(xi脿n)涓�锛屾垜鍊戝彲浠ュ厛闋�(y霉)缃竴鍊�16浣嶇殑瀵勫瓨鍣‵FFF锛堝叏1锛夛紝鐒跺悗鎶�8浣嶇殑2閫�(j矛n)鍒舵暩(sh霉)鎿�(j霉)锛堜竴鍊嬪瓧绡€(ji茅)锛夎垏16浣嶇殑CRC瀵勫瓨鍣ㄤ綆8浣嶇暟鎴�锛屽苟鎶婄祼(ji茅)鏋滄斁鍥濩RC瀵勫瓨鍣ㄥ悓鏅傚瘎瀛樺櫒鍏�(n猫i)瀹瑰彸绉�锛孧SB瑁�(b菙)0锛屽苟妾㈡煡绉诲嚭鐨凩SB銆傚鏋淟SB鐐�0鍓囩辜绾�(x霉)鍙崇Щ鍕�锛岀偤1鍓嘋RC瀵勫瓨鍣ㄨ垏澶氶爡寮忕暟鎴�銆傞噸寰�(f霉)涓婇潰鎿嶄綔鍒颁竴鍊�8bit瀛楃瘈(ji茅)瀹屾垚锛屽啀绻肩簩(x霉)灏嶄笅涓€鍊嬫暩(sh霉)鎿�(j霉)閫�(j矛n)琛岀浉鍚岃檿鐞�锛岀洿鍒版墍鏈夋暩(sh霉)鎿�(j霉)绲�(ji茅)鏉�銆傞€欏€嬫檪鍊機RC瀵勫瓨鍣ㄤ腑鐨勬暩(sh霉)鎿�(j霉)灏辨槸鎴戝€戞墍瑕佺殑CRC纰间簡銆傚(sh铆)鐝�(xi脿n)浠g⒓濡備笅锛�
CRC16Lo = &HFF 鈥楥RC16Lo鐐篊RC瀵勫瓨鍣ㄤ綆8浣�
CRC16Hi = &HFF 鈥楥RC16Hi鐐篊RC瀵勫瓨鍣ㄩ珮8浣�
CL = &H1
CH = &HA0 鈥楢001 H 鏄疌RC锛�16澶氶爡寮忎唬纰�
For i = 0 To UBound锛圖ata锛�
CRC16Lo = CRC16Lo Xor Data锛坕锛� 鈥樻瘡涓€鍊嬫暩(sh霉)鎿�(j霉)鑸嘋RC瀵勫瓨鍣ㄧ暟鎴�
For index = 0 To 7
UseHi = CRC16Hi
UseLo = CRC16Lo
CRC16Hi = CRC16Hi 2
CRC16Lo = CRC16Lo 2 鈥樺彸绉讳竴浣�
If 锛堬紙UseHi And &H1锛� = &H1锛� Then 鈥樺鏋滈珮浣嶅瓧绡€(ji茅)鏈€鍚庝竴浣嶆槸1鐨勮┍
CRC16Lo = CRC16Lo Or &H80 鈥樹綆浣嶅瓧绡€(ji茅)鍙崇Щ鍚庡墠闈㈣(b菙)1
End If
If 锛堬紙UseLo And &H1锛� = &H1锛� Then 鈥樺鏋淟SB 鐐�1锛屽墖鑸囧闋呭紡閫�(j矛n)琛岀暟鎴�
CRC16Hi = CRC16Hi Xor CH
CRC16Lo = CRC16Lo Xor CL
End If
Next index
Next i
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