1銆佸紩瑷€

闅ㄨ憲寰檿鐞嗗櫒銆佽▓绠楁鍜屾暩(sh霉)瀛楅€氫俊鎶€琛�(sh霉)鐨勯閫熺櫦(f膩)灞�锛岃▓绠楁鎺у埗宸茬稉(j墨ng)鎿村睍鍒颁簡骞句箮鎵€鏈夌殑宸ユキ(y猫)闋�(l菒ng)鍩熴€傚叾涓�锛�PLC鍜屽柈鐗囨鍦ㄥ皬瑕�(gu墨)妯℃帶鍒剁郴绲�(t菕ng)涓嵅寰椾簡寤ｆ硾鐨勬噳(y墨ng)鐢�銆�

鍦ㄥ鏂欐摖鍑烘婧害鑷嫊鎺у埗涓紝閬哥敤S7-200绯诲垪PLC浣滅偤涓绘帶鍣ㄤ欢锛孭IC16F877鍠墖姗熶綔鐐烘韩搴︽暩(sh霉)鎿�(j霉)閲囬泦鍜屾ā鏁�(sh霉)杞�(zhu菐n)鎻涜姱鐗�锛屽柈鐗囨閫氶亷閫氫俊绔彛灏囨暩(sh霉)鎿�(j霉)鍌宠几绲LC锛岀敱浜庨噰鐢ㄤ簡RS-485鎺ュ彛妯欐簴锛屽偝杓歌窛闆㈠彲閬�1000m銆�PLC缍�(j墨ng)閬嶱ID閬嬬畻鍚庢帶鍒跺姞鐔卞湀浠ヤ繚鎸佹韩搴︽亽瀹�銆備笅闈㈢祼(ji茅)鍚堝渚嬪氨PLC鍜屽柈鐗囨鐨勯€氫俊瀵︾従(xi脿n)鍋氫竴涓嬩粙绱�銆�

2銆佺‖浠舵(g貌u)鎴�

2.1銆丳IC16F877鍠墖姗�

Microchip鍏徃鐨凱IC16F877鍠墖姗熼噰鐢ㄥ搱浣涚附绶氱祼(ji茅)妲�(g貌u)鍜岀簿绨℃寚浠ら泦鎶€琛�(sh霉)锛屽叿鏈夊姛鑰椾綆銆侀亱琛岄€熷害楂�銆侀﹨(q奴)鍕曡兘鍔涘挤鍜屽鎺ラ浕璺啊娼旂殑鐗归粸銆侾IC16F877鍠墖姗熷収(n猫i)閮ㄩ泦鎴愪簡涓茶閫氫俊妯″鍗抽€氱敤鍚屾/鐣版鏀剁櫦(f膩)鍣║SART妯″锛屼富瑕佹噳(y墨ng)鐢ㄧ洰妯欐槸绯荤当(t菕ng)涔嬮枔鐨勯仩璺濋洟涓茶閫氫俊銆俇SART妯″鎵€闇€鐨勫叐姊濆紩鑵虫槸RC6鍜孯C7锛屽鍦�1鎵€绀猴紝鐣剁櫦(f膩)閫佸厑瑷变綅TXEN琚疆1锛屽氨鍙互鎶婄櫦(f膩)閫佹暩(sh霉)鎿�(j霉)瀵叆TXREG瀵勫瓨鍣ㄤ締瀹屾垚鐧�(f膩)閫併€�

2.2銆丼7-200绯诲垪PLC

S7-200绯诲垪PLC閫氫俊绔彛閲囩敤鐣版涓茶閫氫俊鏂瑰紡锛岄€氫俊绔彛妯欐簴閲囩敤骞宠　椹�(q奴)鍕曘€佸樊鍒嗘帴鍙楃殑RS485鎺ュ彛妯欐簴锛屽彲浠ョ祫鎴愬崐闆欏伐涓茶閫氫俊缍�(w菐ng)绲�(lu貌)锛屾(g貌u)鎴愬垎甯冨紡绯荤当(t菕ng)锛岀郴绲�(t菕ng)涓渶澶氬彲浠ユ湁32鍊嬬珯銆係7-200鏀寔澶氱ó涓茶閫氫俊鍗�(xi茅)璀�锛屽埄鐢ㄨ嚜鐢辩鍙ｆā寮忥紝鍙互閫氶亷瑾炲彞琛ㄦ垨姊舰鍦栫法绋�锛屽鐝�(xi脿n)鐢ㄦ埗瀹氱京鐨勯€氫俊鍗�(xi茅)璀帮紝寰堟柟渚垮湴閫ｆ帴涓嶅悓寤犲鐨勬櫤鑳借ō(sh猫)鍌�銆傚湪鑷敱绔彛妯″紡涓嬶紝鍙互閫ｇ簩(x霉)鍦扮櫦(f膩)閫佹垨鎺ユ敹255鍊嬪瓧绡€(ji茅)浠ュ収(n猫i)鐨勬暩(sh霉)鎿�(j霉)锛岄€欏湪澶у鏁�(sh霉)鎿�(j霉)閫氫俊鏅傛槸寰堟柟渚跨殑銆�

2.3銆丮AX485E鑺墖

MAX485E鑺墖鏄疪S-485鎺ュ彛妯欐簴灏堢敤閫氫俊鑺墖锛屽鍦�1鎵€绀�锛孯O鑵崇偤鏁�(sh霉)鎿�(j霉)杓稿嚭鑵�锛屽畠鎺ユ敹RS-485鐨勫樊妯′俊铏烿AB锛屽苟杞�(zhu菐n)鎻涚偤TTL闆诲钩鐢盧O杓稿嚭锛孯E鑵崇偤RO鐨勪娇鑳界锛屼綆闆诲钩鏅傞伕閫歊O锛岃几鍑烘湁鏁�銆侱I鑵崇偤鏁�(sh霉)鎿�(j霉)杓稿叆绔�锛屽畠灏嘥TL闆诲钩鐨勬暩(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涚偤宸ā淇¤櫉VAB锛屽苟鐢盇銆丅鍏╄叧杓搁€佸嚭鍘�锛孌E鏄疍I浣胯兘绔�锛岄珮闆诲钩閬搁€欴I锛岃几鍏ユ湁鏁�銆傛晠A銆丅鍏╄叧鏃㈡槸RS-485淇¤櫉杓稿叆绔紝鍚屾檪涔熸槸瑭蹭俊铏熺殑杓稿嚭绔�锛岄棞(gu膩n)閸垫槸鐢变娇鑳界RE銆丏E鐨勯浕骞充締姹哄畾銆�

2.4銆佺‖浠堕€ｆ帴鍦�

S7-200PLC閲囩敤RS-485鎺ュ彛妯欐簴锛屾帴鏀跺樊妯′俊铏燂紝鑰孭IC16F877鍠墖姗熺殑杓稿嚭鐐篢TL闆诲钩锛屾墍浠ヤ簩鑰呭湪閫氫俊鏅傚繀闋堝厛閫茶杞�(zhu菐n)鎻�锛屾湰绯荤当(t菕ng)閲囩敤MAX485E鑺墖浣滅偤杞�(zhu菐n)鎻涜姱鐗�锛岀‖浠堕€ｆ帴濡傚湒1鎵€绀�銆傜敱PIC16F877鍠墖姗熺殑RC4閬告搰鏁�(sh霉)鎿�(j霉)鐨勮几鍏ユ垨杓稿嚭銆�

鍦�1纭欢閫ｆ帴鍦�

3銆侀€氫俊鍗�(xi茅)璀�

鏈爡鐩腑鐢变簬PIC16F877鍠墖姗熷彧鏄櫦(f膩)閫佹暩(sh霉)鎿�(j霉)锛孭LC鍠磾鎺ユ敹鏁�(sh霉)鎿�(j霉)锛屾墍浠ラ噰鐢ㄥ柈宸ヤ覆琛岄€氫俊銆侾LC閲囩敤鑷敱绔彛妯″紡鍗�(xi茅)璀�锛屽崝(xi茅)璀扮敱瑾炲彞琛ㄧ法绋嬪鐝�(xi脿n);鍠墖姗熶娇鐢║SART妯″鐨勭暟姝ョ櫦(f膩)閫佹ā寮�锛屽崝(xi茅)璀扮敤鍖法瑾炶█绶ㄧ▼瀵︾従(xi脿n)銆傜敱PIC16F877鍠墖姗熺殑鐧�(f膩)閫佺珐娌栫祼(ji茅)妲�(g貌u)鍙煡锛屼竴娆″彧鑳介€ｇ簩(x霉)鐧�(f膩)閫佸叐鍊嬪瓧绡€(ji茅)鐨勬暩(sh霉)鎿�(j霉)锛屾晠PLC閲囩敤瀛楃鎺ユ敹瀹屾垚涓柗姣旇純鏂逛究銆傛帴鍙ｆ婧栭噰鐢ㄨ垏PLC鍋�(c猫)涓€鑷寸殑RS-485锛屾帴闋噰鐢�9閲滵褰㈤€ｆ帴鍣�锛屽偝杓哥窔閲囩敤灞忚斀闆欑禐绶氾紝鍠墖姗熷伌(c猫)鐨勭櫦(f膩)閫佹暩(sh霉)鎿�(j霉)闇€缍�(j墨ng)杞�(zhu菐n)鎻涘悗鍐嶇櫦(f膩)閫�銆�

瀛楃淇℃伅鏍煎紡鐐猴細1浣嶈捣濮嬩綅锛�8浣嶆暩(sh霉)鎿�(j霉)浣嶏紝鐒℃牎椹椾綅锛�1浣嶅仠姝綅銆�

鐣版閫氫俊鐨勫瓧绗︿俊鎭牸寮忓鍦�2鎵€绀�銆�

鍦�2瀛楃淇℃伅鏍煎紡

鏁�(sh霉)鎿�(j霉)浣嶇殑鐧�(f膩)閫侀爢搴忕偤浣庝綅鍦ㄥ墠锛岄珮浣嶅湪鍚庛€�

鐣版閫氫俊鐨勫偝杓搁€熺巼鍗虫尝鐗圭巼閬告搰鐐�38400bit/s銆傜偤鎻愰珮鏁�(sh霉)鎿�(j霉)鍌宠几?sh霉)鐩吔鍟冭顑嶆崕鍗儮铔愶綊?锛屽牨鏂囬噰鐢ㄥ畾闀风櫦(f膩)閫�锛屽墠鍥涘€嬪瓧绡€(ji茅)鍙冨姞鐣版垨鏍￠锛屽牨鏂囩殑鏈€鍚庝竴鍊嬪瓧绡€(ji茅)鐐烘牎椹楃⒓銆侾IC16F877鍠墖姗熺殑妯℃暩(sh霉)杞�(zhu菐n)鎻涚簿搴︾偤10浣嶏紝鏁呮韩搴﹀€奸噰鐢ㄩ洐瀛楃瘈(ji茅)淇濆瓨銆傚牨鏂囧箑鏍煎紡濡傝〃1鎵€绀�銆�

琛�1鍫辨枃骞€鏍煎紡

4銆佸垵濮嬭ō(sh猫)缃�

4.1銆丳IC16F877鍠墖姗熺櫦(f膩)閫佹暩(sh霉)鎿�(j霉)鍒濆瑷�(sh猫)缃�

PIC16F877鍠墖姗熷収(n猫i)閮ㄩ泦鎴愮殑USART妯″浣跨敤鐨勬尝鐗圭巼鎳�(y墨ng)瑭插拰S7-200PLC鐩稿悓锛岀暥閲囩敤楂橀€熸尝鐗圭巼鏅�锛屾尝鐗圭巼瀵勫瓨鍣⊿PBRG鐢变笅寮忚▓绠楋細

SPBRG=F/锛�16&TImes;娉㈢壒鐜囷級-1

寮忎腑锛欶鈥斺€斺€斿柈鐗囨鏅傞悩闋荤巼銆�

鍠墖姗熺殑鏁�(sh霉)鎿�(j霉)浣�銆佹牎椹椾綅銆佸仠姝綅瑕佸拰PLC绲�(t菕ng)涓€銆�

PIC16F877鍠墖姗熸渶澶氬彧鑳介€ｇ簩(x霉)鐧�(f膩)閫佸叐鍊嬪瓧绡€(ji茅)鐨勬暩(sh霉)鎿�(j霉)銆傚叾鍒濆瑷�(sh猫)缃尟绶ㄨ獮瑷€绋嬪簭濡備笅锛�

LISTP=16F877A;鍋芥寚浠�

INCLUDE鈥淧16F877A.INC鈥�;鍋芥寚浠�

;-------------------楂�1瑷�(sh猫)缃瓙绋嬪簭-------------------

T1BCFSTATUS锛孯P1;

BSFSTATUS锛孯P0;楂�1

MOVLWD鈥�5鈥�;38400bit/s

MOVWFSPBRG;

MOVLWB鈥�00100100鈥�;鐣版锛岀櫦(f膩)閫佷娇鑳�

MOVWFTXSTA;楂橀€�锛�8浣嶆暩(sh霉)鎿�(j霉)

MOVLWB鈥�11101111鈥�;RC6锛孯C7锛�

MOVWFTRISC;RC4閫氫俊

CLRFINTCON;绂佹涓柗

RETURN;瀛愮▼搴忚繑鍥�

;-------------------楂�0瑷�(sh猫)缃瓙绋嬪簭-------------------

T0BCFSTATUS锛孯P0;楂�0

BSFPORTC锛�4;RC4=1閫氫俊

MOVLWB鈥�10000000鈥�;浣胯兘涓插彛

RETURN;瀛愮▼搴忚繑鍥�

4.2S7-200PLC鎺ユ敹鏁�(sh霉)鎿�(j霉)鍒濆瑷�(sh猫)缃�

CPU铏曚簬STOP妯″紡鏅�锛岃嚜鐢辩鍙ｆā寮忚绂佹锛屼娇鐢ㄥ叾瀹冩ā寮忕殑閫氫俊锛屼緥濡傝垏绶ㄧ▼瑷�(sh猫)鍌欑殑閫氫俊銆傚彧鏈塁PU铏曚簬RUN妯″紡鏅�锛屾墠鑳戒娇鐢ㄨ嚜鐢辩鍙ｆā寮�銆傚鏋滀娇鐢ㄩ€氫俊绔彛0閫氫俊锛屽皣閫氶亷鐗规畩瀛樺劜鍣⊿MB30閫茶鍒濆瑷�(sh猫)缃�銆�

Network1

LDSM0.7//鑻ョ偤RUN妯″紡

EU//涓婂崌娌�

OSM0.1//鎴栭娆℃巸鎻�

MOVB16#01锛孲MB30//38400bit/s锛�8锛孨锛�1

ATCHINT0锛�8//涓柗鑸噄nt0閫ｆ帴

ENI//鍏佽ū涓柗

Network2

LDNSM0.7//鑻ラ潪RUN妯″紡

EU//涓婂崌娌�

RSM30.0锛�1//瑷�(sh猫)缃偤PPI鍗�(xi茅)璀�

DTCH8//绂佹涓柗

5銆侀€氫俊绋嬪簭

5.1銆丳IC16F877鍠墖姗熺櫦(f膩)閫佹暩(sh霉)鎿�(j霉)閫氫俊绋嬪簭

鍫辨枃閲囩敤瀹氶暦鐧�(f膩)閫�锛屾瘡涓€骞€鍫辨枃鐢变簲鍊嬪瓧绡€(ji茅)绲勬垚锛屾瘡涓€婧害鍊奸兘缍�(j墨ng)鏁�(sh霉)瀛楁烤娉㈠悗鍐嶇櫦(f膩)閫�銆傜敱浜庢韩搴﹀€艰畩鍖栫珐鎱�锛屽皪閫氫俊鐨勫鏅傛€ц姹傝純浣庯紝鍦ㄧ櫦(f膩)閫佹暩(sh霉)鎿�(j霉)閫氫俊绋嬪簭涓姞鍏ヤ簡杓冨鐨勫欢鏅傜▼搴�銆傜敱浜庢尝鐗圭巼鏅傞悩渚濊炒浜庣郴绲�(t菕ng)鏅傚熀鎸暕鍣�锛屾墍浠ュ柈鐗囨閫插叆鐫＄湢鐙€鎱�(t脿i)鏅備笉鑳介€茶鐣版閫氫俊銆傚柈鐗囨鐧�(f膩)閫丯鍊嬫脯婧粸婧害鏁�(sh霉)鎿�(j霉)閫氫俊绋嬪簭娴佺▼鍦栧鍦�3鎵€绀�銆�

鍦�3鍠墖姗熺▼搴忔祦绋嬪湒

5.2銆丼7-200PLC鎺ユ敹鏁�(sh霉)鎿�(j霉)閫氫俊绋嬪簭

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