ModBus閫氳▕鍗�(xi茅)璀板垎鐐篟TU鍗�(xi茅)璀板拰ASCII鍗�(xi茅)璀帮紝鎴戝叕鍙哥殑澶氱ó鍎€琛ㄩ兘閲囩敤ModBus RTU閫氳▕鍗�(xi茅)璀�锛屽锛歒D2000鏅鸿兘闆诲姏鐩�(ji膩n)娓剙銆佸贰妾㈣〃銆佹暩(sh霉)椤〃銆佸厜鏌辨暩(sh霉)椤〃绛�銆備笅闈㈠氨ModBus RTU鍗�(xi茅)璀扮啊瑕佷粙绱瑰涓嬶細
涓€銆侀€氳▕鍗�(xi茅)璀�
锛堜竴锛夈€侀€氳▕鍌抽€佹柟寮�锛�
銆€銆€ 閫氳▕鍌抽€佸垎鐐虹崹绔嬬殑淇℃伅闋�锛屽拰鐧�(f膩)閫佺殑绶ㄧ⒓鏁�(sh霉)鎿�(j霉)銆備互涓嬬殑閫氳▕鍌抽€佹柟寮忓畾缇╀篃鑸嘙ODBUS RTU閫氳▕瑕�(gu墨)绱勭浉鍏煎锛�
绶� 纰� |
8浣嶄簩閫插埗 |
璧峰浣� |
1浣� |
鏁�(sh霉)鎿�(j霉)浣� |
8浣� |
濂囧伓鏍￠浣� |
1浣嶏紙鍋舵牎椹椾綅锛� |
鍋滄浣� |
1浣� |
閷鏍℃ |
CRC锛堝啑浣欏惊鐠�(hu谩n)纰硷級 |
鍒濆绲�(ji茅)妲�(g貌u) = 鈮�4瀛楃瘈(ji茅)鐨勬檪闁�
鍦板潃纰� = 1 瀛楃瘈(ji茅)
鍔熻兘纰� = 1 瀛楃瘈(ji茅)
鏁�(sh霉)鎿�(j霉)鍗€(q奴) = N 瀛楃瘈(ji茅)
閷鏍℃ = 16浣岰RC纰�
绲�(ji茅)鏉熺祼(ji茅)妲�(g貌u) = 鈮�4瀛楃瘈(ji茅)鐨勬檪闁�
銆€銆€鍦板潃纰�锛氬湴鍧€纰肩偤閫氳▕鍌抽€佺殑绗竴鍊嬪瓧绡€(ji茅)銆傞€欏€嬪瓧绡€(ji茅)琛ㄦ槑鐢辩敤鎴惰ō(sh猫)瀹氬湴鍧€纰肩殑寰炴灏囨帴鏀剁敱涓绘鐧�(f膩)閫佷締鐨勪俊鎭€傚苟涓旀瘡鍊嬪緸姗熼兘鏈夊叿鏈夊敮涓€鐨勫湴鍧€纰�锛屽苟涓旈熆鎳�(y墨ng)鍥為€佸潎浠ュ悇鑷殑鍦板潃纰奸枊濮嬨€備富姗熺櫦(f膩)閫佺殑鍦板潃纰艰〃鏄庡皣鐧�(f膩)閫佸埌鐨勫緸姗熷湴鍧€锛岃€屽緸姗熺櫦(f膩)閫佺殑鍦板潃纰艰〃鏄庡洖閫佺殑寰炴鍦板潃銆�
銆€銆€鍔熻兘纰�锛氶€氳▕鍌抽€佺殑绗簩鍊嬪瓧绡€(ji茅)銆侻odBus閫氳▕瑕�(gu墨)绱勫畾缇╁姛鑳借櫉鐐�1鍒�127銆傛湰鍎€琛ㄥ彧鍒╃敤鍏朵腑鐨勪竴閮ㄥ垎鍔熻兘纰笺€備綔鐐轰富姗熻珛姹傜櫦(f膩)閫�锛岄€氶亷鍔熻兘纰煎憡瑷村緸姗熷煼(zh铆)琛屼粈涔堝嫊浣�銆備綔鐐哄緸姗熼熆鎳�(y墨ng)锛屽緸姗熺櫦(f膩)閫佺殑鍔熻兘纰艰垏寰炰富姗熺櫦(f膩)閫佷締鐨勫姛鑳界⒓涓€妯ｏ紝骞惰〃鏄庡緸姗熷凡闊挎噳(y墨ng)涓绘閫茶鎿嶄綔銆傚鏋滃緸姗熺櫦(f膩)閫佺殑鍔熻兘纰肩殑鏈€楂樹綅鐐猴紤(姣斿鍔熻兘纰煎ぇ鑸囨鍚屾檪127)锛屽墖琛ㄦ槑寰炴娌掓湁闊挎噳(y墨ng)鎿嶄綔鎴栫櫦(f膩)閫佸嚭閷�銆�
銆€銆€鏁�(sh霉)鎿�(j霉)鍗€(q奴)锛氭暩(sh霉)鎿�(j霉)鍗€(q奴)鏄牴鎿�(j霉)涓嶅悓鐨勫姛鑳界⒓鑰屼笉鍚�銆傛暩(sh霉)鎿�(j霉)鍗€(q奴)鍙互鏄闅涙暩(sh霉)鍊笺€佽ō(sh猫)缃粸銆佷富姗熺櫦(f膩)閫佺郸寰炴鎴栧緸姗熺櫦(f膩)閫佺郸涓绘鐨勫湴鍧€銆�
銆€銆€ CRC纰�锛氫簩瀛楃瘈(ji茅)鐨勯尟瑾ゆ娓⒓銆�
锛堜簩锛�銆侀€氳▕瑕�(gu墨)绱勶細
銆€銆€ 鐣�(d膩ng)閫氳▕鍛戒护鐧�(f膩)閫佽嚦鍎€鍣ㄦ檪锛岀鍚堢浉鎳�(y墨ng)鍦板潃纰肩殑瑷�(sh猫)鍌欐帴閫氳▕鍛戒护锛屽苟闄ゅ幓鍦板潃纰�锛岃畝鍙栦俊鎭�锛屽鏋滄矑鏈夊嚭閷紝鍓囧煼(zh铆)琛岀浉鎳�(y墨ng)鐨勪换鍕�(w霉)锛涚劧鍚庢妸鍩�(zh铆)琛岀祼(ji茅)鏋滆繑閫佺郸鐧�(f膩)閫佽€�銆傝繑閫佺殑淇℃伅涓寘鎷湴鍧€纰�銆佸煼(zh铆)琛屽嫊浣滅殑鍔熻兘纰笺€佸煼(zh铆)琛屽嫊浣滃悗绲�(ji茅)鏋滅殑鏁�(sh霉)鎿�(j霉)浠ュ強閷鏍￠纰�銆傚鏋滃嚭閷氨涓嶇櫦(f膩)閫佷换浣曚俊鎭�銆�
1锛庝俊鎭箑绲�(ji茅)妲�(g貌u)
鍦板潃纰� |
鍔熻兘纰� |
鏁�(sh霉)鎿�(j霉)鍗€(q奴) |
閷鏍￠纰� |
8浣� |
8浣� |
N 脳 8浣� |
16浣� |
銆€銆€鍦板潃纰�锛氬湴鍧€纰兼槸淇℃伅骞€鐨勭涓€瀛楃瘈(ji茅)(8浣�)锛屽緸0鍒�255銆傞€欏€嬪瓧绡€(ji茅)琛ㄦ槑鐢辩敤鎴惰ō(sh猫)缃湴鍧€鐨勫緸姗熷皣鎺ユ敹鐢变富姗熺櫦(f膩)閫佷締鐨勪俊鎭�銆傛瘡鍊嬪緸姗熼兘蹇呴爤鏈夊敮涓€鐨勫湴鍧€纰�锛屽苟涓斿彧鏈夌鍚堝湴鍧€纰肩殑寰炴鎵嶈兘闊挎噳(y墨ng)鍥為€�銆傜暥(d膩ng)寰炴鍥為€佷俊鎭檪锛岀浉鐣�(d膩ng)?sh霉)鐗″垈鍙峚琛ㄦ槑瑭蹭俊鎭締鑷簬浣曡檿銆�
銆€銆€ 鍔熻兘纰�锛氫富姗熺櫦(f膩)閫佺殑鍔熻兘纰煎憡瑷村緸姗熷煼(zh铆)琛屼粈涔堜换鍕�(w霉)銆傝〃1-1鍒楀嚭鐨勫姛鑳界⒓閮芥湁鍏烽珨鐨勫惈缇╁強鎿嶄綔銆�
浠ｇ⒓ |
鍚京 |
鎿嶄綔 |
03 |
璁€鍙栨暩(sh霉)鎿�(j霉) |
璁€鍙栫暥(d膩ng)鍓嶅瘎瀛樺櫒鍏�(n猫i)涓€鍊嬫垨澶氬€嬩簩閫插埗鍊� |
06 |
閲嶇疆鍠竴瀵勫瓨鍣� |
鎶婅ō(sh猫)缃殑浜岄€插埗鍊煎鍏ュ柈涓€瀵勫瓨鍣� |
銆€銆€鏁�(sh霉)鎿�(j霉)鍗€(q奴)锛氭暩(sh霉)鎿�(j霉)鍗€(q奴)鍖呭惈闇€瑕佸緸姗熷煼(zh铆)琛屼粈涔堝嫊浣滄垨鐢卞緸姗熼噰闆嗙殑杩旈€佷俊鎭�銆傞€欎簺淇℃伅鍙互鏄暩(sh霉)鍊�銆佸弮鑰冨湴鍧€绛夌瓑銆備緥濡�锛屽姛鑳界⒓鍛婅ù寰炴璁€鍙栧瘎瀛樺櫒鐨勫€硷紝鍓囨暩(sh霉)鎿�(j霉)鍗€(q奴)蹇呴渶鍖呭惈瑕佽畝鍙栧瘎瀛樺櫒鐨勮捣濮嬪湴鍧€鍙婅畝鍙栭暦搴�銆傚皪浜庝笉鍚岀殑寰炴锛屽湴鍧€鍜屾暩(sh霉)鎿�(j霉)淇℃伅閮戒笉鐩稿悓銆�
銆€銆€閷鏍￠纰�锛氫富姗熸垨寰炴鍙敤鏍￠纰奸€茶鍒ゅ垾鎺ユ敹淇℃伅鏄惁鍑洪尟銆傛湁鏅傦紝鐢变簬闆诲瓙鍣伈鎴栧叾瀹冧竴浜涘共鎿�锛屼俊鎭湪鍌宠几閬庣▼涓渻鐧�(f膩)鐢熺窗寰殑璁婂寲锛岄尟瑾ゆ牎椹楃⒓淇濊瓑浜嗕富姗熸垨寰炴灏嶅湪鍌抽€侀亷绋嬩腑鍑洪尟鐨勪俊鎭笉璧蜂綔鐢�銆傞€欐ǎ澧炲姞浜嗙郴绲�(t菕ng)鐨勫畨鍏ㄥ拰鏁堢巼銆傞尟瑾ゆ牎椹楅噰鐢–RC-16鏍￠鏂规硶銆�
娉細淇℃伅骞€鐨勬牸寮忛兘鍩烘湰鐩稿悓锛氬湴鍧€纰�銆佸姛鑳界⒓銆佹暩(sh霉)鎿�(j霉)鍗€(q奴)鍜岄尟瑾ゆ牎椹楃⒓銆�
2锛庨尟瑾ゆ牎椹�
銆€銆€ 鍐椾綑寰挵(hu谩n)纰硷紙CRC锛夊寘鍚�2鍊嬪瓧绡€(ji茅)锛屽嵆16浣嶄簩閫插埗銆侰RC纰肩敱鐧�(f膩)閫佽ō(sh猫)鍌欒▓绠�锛屾斁缃簬鐧�(f膩)閫佷俊鎭殑灏鹃儴銆傛帴鏀朵俊鎭殑瑷�(sh猫)鍌欏啀閲嶆柊瑷堢畻鎺ユ敹鍒颁俊鎭殑 CRC纰�锛屾瘮杓冭▓绠楀緱鍒扮殑CRC纰兼槸鍚﹁垏鎺ユ敹鍒扮殑鐩哥锛屽鏋滃叐鑰呬笉鐩哥锛屽墖琛ㄦ槑鍑洪尟銆�
銆€銆€CRC纰肩殑瑷堢畻鏂规硶鏄�锛屽厛闋�(y霉)缃�16浣嶅瘎瀛樺櫒鍏ㄧ偤1銆傚啀閫愭鎶婃瘡8浣嶆暩(sh霉)鎿�(j霉)淇℃伅閫茶铏曠悊銆傚湪閫茶CRC纰艰▓绠楁檪鍙敤8浣嶆暩(sh霉)鎿�(j霉)浣�锛岃捣濮嬩綅鍙婂仠姝綅锛屽鏈夊鍋舵牎椹椾綅鐨勮┍涔熷寘鎷鍋舵牎椹椾綅锛岄兘涓嶅弮鑸嘋RC纰艰▓绠�銆�
銆€銆€ 鍦ㄨ▓绠桟RC纰兼檪锛�8浣嶆暩(sh霉)鎿�(j霉)鑸囧瘎瀛樺櫒鐨勬暩(sh霉)鎿�(j霉)鐩哥暟鎴�锛屽緱鍒扮殑绲�(ji茅)鏋滃悜浣庝綅绉讳竴瀛楃瘈(ji茅)锛岀敤0濉鏈€楂樹綅銆傚啀妾㈡煡鏈€浣庝綅锛屽鏋滄渶浣庝綅鐐�1锛屾妸瀵勫瓨鍣ㄧ殑鍏�(n猫i)瀹硅垏闋�(y霉)缃暩(sh霉)鐩哥暟鎴栵紝濡傛灉鏈€浣庝綅鐐�0锛屼笉閫茶鐣版垨閬嬬畻銆�
銆€銆€ 閫欏€嬮亷绋嬩竴鐩撮噸寰�(f霉)8娆�銆傜8娆＄Щ浣嶅悗锛屼笅涓€鍊�8浣嶅啀鑸囩従(xi脿n)鍦ㄥ瘎瀛樺櫒鐨勫収(n猫i)瀹圭浉鐩哥暟鎴�锛岄€欏€嬮亷绋嬭垏浠ヤ笂涓€妯ｉ噸寰�(f霉)8娆�銆傜暥(d膩ng)鎵€鏈夌殑鏁�(sh霉)鎿�(j霉)淇℃伅铏曠悊瀹屽悗锛屾渶鍚庡瘎瀛樺櫒鐨勫収(n猫i)瀹瑰嵆鐐篊RC纰煎€笺€侰RC纰间腑鐨勬暩(sh霉)鎿�(j霉)鐧�(f膩)閫�銆佹帴鏀舵檪浣庡瓧绡€(ji茅)鍦ㄥ墠銆�
銆€銆€ 瑷堢畻CRC纰肩殑姝ラ鐐猴細
闋�(y霉)缃�16浣嶅瘎瀛樺櫒鐐哄崄鍏€插埗FFFF锛堝嵆鍏ㄧ偤1锛�銆傜ū姝ゅ瘎瀛樺櫒鐐篊RC瀵勫瓨鍣紱
鎶婄涓€鍊�8浣嶆暩(sh霉)鎿�(j霉)鑸�16浣岰RC瀵勫瓨鍣ㄧ殑浣庝綅鐩哥暟鎴�锛屾妸绲�(ji茅)鏋滄斁浜嶤RC瀵勫瓨鍣�锛�
鎶婂瘎瀛樺櫒鐨勫収(n猫i)瀹瑰彸绉讳竴浣�(鏈濅綆浣�)锛岀敤0濉鏈€楂樹綅锛屾鏌ユ渶浣庝綅锛�
濡傛灉鏈€浣庝綅鐐�0锛氶噸寰�(f霉)绗�3姝�(鍐嶆绉讳綅); 濡傛灉鏈€浣庝綅鐐�1锛欳RC瀵勫瓨鍣ㄨ垏澶氶爡寮廇001锛�1010 0000 0000 0001锛夐€茶鐣版垨锛�
閲嶅京(f霉)姝ラ3鍜�4锛岀洿鍒板彸绉�8娆�锛岄€欐ǎ鏁村€�8浣嶆暩(sh霉)鎿�(j霉)鍏ㄩ儴閫茶浜嗚檿鐞嗭紱
閲嶅京(f霉)姝ラ2鍒版椹�5锛岄€茶涓嬩竴鍊�8浣嶆暩(sh霉)鎿�(j霉)鐨勮檿鐞嗭紱
鏈€鍚庡緱鍒扮殑CRC瀵勫瓨鍣ㄥ嵆鐐篊RC纰�銆�
3锛庡姛鑳界⒓03锛岃畝鍙栭粸鍜岃繑鍥炲€硷細
銆€銆€鍎€琛ㄩ噰鐢∕odbus RTU閫氳▕瑕�(gu墨)绱勶紝鍒╃敤閫氳▕鍛戒护锛屽彲浠ラ€茶璁€鍙栭粸(鈥滀繚鎸佸瘎瀛樺櫒鈥�) 鎴栬繑鍥炲€�(鈥滆几鍏ュ瘎瀛樺櫒鈥� )鐨勬搷浣溿€備繚鎸佸拰杓稿叆瀵勫瓨鍣ㄩ兘鏄�16浣嶏紙2瀛楃瘈(ji茅)锛夊€�锛屽苟涓旈珮浣嶅湪鍓嶃€傞€欐ǎ鐢ㄤ簬鍎€琛ㄧ殑璁€鍙栭粸鍜岃繑鍥炲€奸兘鏄�2瀛楃瘈(ji茅)銆備竴娆℃渶澶氬彲璁€鍙栧瘎瀛樺櫒鏁�(sh霉)鏄�60銆傜敱浜庝竴浜涘彲绶ㄧ▼鎺у埗鍣ㄤ笉鐢ㄥ姛鑳界⒓03锛屾墍浠ュ姛鑳界⒓03琚敤浣滆畝鍙栭粸鍜岃繑鍥炲€�銆傚緸姗熼熆鎳�(y墨ng)鐨勫懡浠ゆ牸寮忔槸寰炴鍦板潃銆佸姛鑳界⒓銆佹暩(sh霉)鎿�(j霉)鍗€(q奴)鍙奀RC纰�銆傛暩(sh霉)鎿�(j霉)鍗€(q奴)涓殑瀵勫瓨鍣ㄦ暩(sh霉)鎿�(j霉)閮芥槸姣忓叐鍊嬪瓧绡€(ji茅)楂樺瓧绡€(ji茅)鍦ㄥ墠銆�
4锛庡姛鑳界⒓06锛屽柈榛炰繚瀛�
銆€銆€涓绘鍒╃敤閫欐鍛戒护鎶婂柈榛炴暩(sh霉)鎿�(j霉)淇濆瓨鍒板剙琛ㄧ殑瀛樺劜鍣ㄣ€傚緸姗熶篃鐢ㄩ€欏€嬪姛鑳界⒓鍚戜富姗熻繑閫佷俊鎭�銆�
浜屻€佺法绋嬭垑渚�
銆€銆€涓嬮潰鏄竴鍊嬬敤VC绶ㄥ鐨凪odBus RTU閫氳▕鐨勪緥瀛�
锛堜竴锛�銆侀€氳▕鍙ｈō(sh猫)缃�
DCB dcb;
hCom=CreateFile("COM1",
銆€銆€銆€銆€ GENERIC_READ|GENERIC_WRITE,
銆€銆€銆€銆€銆€0,
銆€銆€銆€銆€銆€NULL,
銆€銆€銆€銆€銆€OPEN_EXISTING,
銆€銆€銆€銆€銆€0,
銆€銆€銆€銆€銆€NULL);
if(hCom==INVALID_HANDLE_VALUE)
{
銆€銆€MessageBox("createfile error,error");
}
BOOL error=SetupComm(hCom,1024,1024);
if(!error)
銆€銆€MessageBox("setupcomm error");
error=GetCommState(hCom,&dcb);
if(!error)
銆€銆€MessageBox("getcommstate,error");
dcb.BaudRate=2400;
dcb.ByteSize=8;
dcb.Parity=EVENPARITY;//NOPARITY;
dcb.StopBits=ONESTOPBIT;error=SetCommState(hCom,&dcb);
锛堜簩锛�銆丆RC鏍￠纰艰▓绠�
UINT crc
void calccrc(BYTE crcbuf)
{
BYTE i;crc=crc ^ crcbuf;
for(i=0;i<8;i++)
{
BYTE TT;
TT=crc&1;
crc=crc>>1;
crc=crc&0x7fff;
if (TT==1)
crc=crc^0xa001;
crc=crc&0xffff;
}
}
锛堜笁锛�銆佹暩(sh霉)鎿�(j霉)鐧�(f膩)閫�
zxaddr=11;//璁€鍙栧湴鍧€鐐�11鐨勫贰妾㈣〃鏁�(sh霉)鎿�(j霉)
zxnum=10;//璁€鍙栧崄鍊嬮€氶亾鐨勬暩(sh霉)鎿�(j霉)writebuf2[0]=zxaddr;
writebuf2[1]=3;
writebuf2[2]=0;
writebuf2[3]=0;
writebuf2[4]=0;
writebuf2[5]=zxnum;
crc=0xffff;
calccrc(writebuf2[0]);
calccrc(writebuf2[1]);
calccrc(writebuf2[2]);
calccrc(writebuf2[3]);
calccrc(writebuf2[4]);
calccrc(writebuf2[5]);writebuf2[6]=crc & 0xff;
writebuf2[7]=crc/0x100;
WriteFile(hCom,writebuf2,8,&comnum,NULL);
锛堝洓锛�銆佹暩(sh霉)鎿�(j霉)璁€鍙�
ReadFile(hCom,writebuf,5+zxnum*2,&comnum,NULL);//璁€鍙杬xnum鍊嬮€氶亾鏁�(sh霉)鎿�(j霉)
鍙鍔犻尟瑾よ檿鐞嗙▼搴忥紝濡傚湴鍧€纰奸尟瑾�銆丆RC纰奸尟瑾ゅ垽鏂�銆侀€氳▕鏁呴殰铏曠悊绛�銆�