銆愭憳瑕併€戜粙绱逛簡鍦╒B6.0 鐠�(hu谩n)澧冧笅PC姗熻垏S7鈥�200PLC鑷敱鍙i€氫俊鐨勫鐝炬柟娉�锛屽苟绲愬悎瀹夊叏闁ユ埃瀵嗘€ф娓帶鍒剁郴绲�(t菕ng)鐨勯枊鐧�(f膩)瀵︿緥锛屽垎鏋愪簡VB鑸嘝LC閫氫俊鐨勯棞閸垫妧琛�锛屽悓鏅傚皪閫氫俊涓噸榛為儴鍒嗕綔浜嗙啊瑕佽鏄�銆�
闂滈嵉瑭�锛歏B6.0锛汸LC锛涜嚜鐢卞彛妯″紡锛汳scomm
銆�
Abstract銆慣he communication between PC and S7 - 200PLC under freeport mode based on VB6.0 is introduced in this. The key techniques of communication between VB and PLC are analyzed with gas leak test system for butterfly valve for an Optical experiment table锛宎nd brief explanations of important part in communication are also added.
Key words: VB6. 0锛汸LC锛汧reeport model; Mscomm
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闅ㄨ憲鍙法绋嬫帶鍒跺櫒锛圥LC锛夋妧琛撶殑杩呴€熺櫦(f膩)灞�锛孭LC鍦ㄦ垜鍦嬪悇鍊嬪伐妤�(y猫)鎺у埗闋樺煙涓緱鍒颁簡瓒婁締瓒婂唬娉涚殑鎳夌敤銆傝€岃タ闁€瀛愬叕鍙哥敓鐢㈢殑S7-200绯诲垪灏忓瀷PLC锛屼互鍏跺姛鑳藉挤浜�锛屼娇鐢ㄧ┅(w臎n)瀹氫笖鎬у児姣旈珮鑰屽湪涓湅甯傚牬涓婂崰鏈夊緢閲嶈鐨勫湴浣�锛屽叾鍏ч儴闆嗘垚鐨勯€氫俊鎺ュ彛鐐虹敤鎴舵彁渚涗簡寮峰ぇ鐨勯€氫俊鍔熻兘锛屾牴鎿氫笉鍚岀殑鍗旇閫氶亷鎺ュ彛浣垮緱PLC鍙垏涓嶅悓鐨勮ō鍌欓€茶閫氫俊骞剁祫鎴愮恫绲�锛屽鐝炬暩鎿氬偝閫佸強鎺у埗绛夊姛鑳姐€係7-200绯诲垪PLC鏀寔鑷敱鍙e崝璀�锛屽畠鐐虹敤鎴跺湪浣跨敤鏅傦紝鎻愪緵浜嗗緢澶氭柟渚夸箣铏�銆傛湰鏂囦富瑕佺爺绌剁殑鏄湪VB6.0鐠�(hu谩n)澧冧笅S7- 200PLC鑸嘝C姗熻嚜鐢卞彛閫氫俊鐨勫鐝�锛屽苟绲愬悎瀹夊叏闁ユ娓帶鍒剁郴绲�(t菕ng)鐨勯枊鐧�(f膩)瀵︿緥鍔犱互瑾槑銆�
1锛庣郴绲�(t菕ng)纭欢绲勬垚
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2锛庢帶鍒剁殑鍏у鍜岃姹�
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鏈帶鍒剁郴绲�(t菕ng)瑷▓浠诲嫏闇€瑕佸鐝句互涓嬬洰妯�:
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3 PC姗熻垏PLC閫氫俊鍩虹
3.1PLC鑷敱鍙i€氫俊鍛戒护
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鍦�2 RCV 鐨勭珐娌栧崁(q奴)鏍煎紡鐐篬/align]
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3.2 Mscomm 鎺т欢
鐐轰簡瀵︾従PC 姗熻垏涓嬩綅姗烶LC 涔嬮枔鐨勯€氫俊锛學indows 鎻愪緵浜哅scomm 鎺т欢浠ヤ緵鐢ㄦ埗浣跨敤銆傚畠灏佽浜嗛棞浜庨€氫俊鐨勭浉闂滃収瀹�锛屾垜鍊戝彧闇€鍦ㄢ収骞宠嚭涓�锛岃ō缃叾鐩搁棞灞€�锛屽苟涓斿皪鍏剁殑浜嬩粈閫茶鐩告噳鐨勭法绋嬪嵆鍙娇鐢�銆傞棞浜嶮scomm 鎺т欢鐨勪竴浜涢噸瑕佸爆鎬ц琛�1銆�
闂滀簬Mscomm鎺т欢鐨勪簨浠�锛屽彧鏈変竴绋�锛屽嵆OnComm浜嬩欢锛岄€氫俊涓彧瑕佹湁閷鎴栦簨浠剁櫦(f膩)鐢熸檪锛屽氨鏈冪敘鐢烵nComm浜嬩欢锛岃€孋ommEvent 灞€у偝鍥炰笉鍚岀殑閷鎴栦簨浠讹細
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灏嶆噳鐨勬暩纰煎€�锛屾摎姝ゅ彲灏嶄簨浠堕€茶铏曠悊銆傚湪鏈枃鐨勯€氫俊閬庣▼涓紝涓昏鐢ㄥ埌鐨勬槸ComEvReceive鍊�銆傜暥鎺ユ敹绶╂矕鍗€(q奴)鏈夋暩鎿氭檪鐢㈢敓瑭插€�锛岀劧鍚庡皪Input鍊奸€茶鐩告噳鐨勮檿鐞�銆�
4锛嶸B6.0骞宠嚭PC姗熻垏PLC鐨勯€氫俊
Microsoft鍏徃鐢熺敘鐨刅isual Basic6.0鏄疻indows 鐠�(hu谩n)澧冧笅鐨勪竴绋彲瑕栧寲绶ㄧ▼瑾炶█闁嬬櫦(f膩)绯荤当(t菕ng)锛屽畠浠ュ挤澶х殑鍦栧舰瑷▓鑳藉姏锛岀啊鏄撶殑绶ㄧ▼瑾炶█鍜屽鏄撳缈掍娇鐢ㄧ瓑鍎�(y艒u)榛炲湪宸ョ▼涓緱鍒颁簡寤f硾鐨勬噳鐢�锛屾垜鍊戞鏄娇鐢ㄥ畠閫茶浜嗚垏PLC 閫氳▕鐨勯枊鐧�(f膩)銆�
PLC I/O鍒嗛厤琛ㄨ琛�2锛屽彧鍒楀嚭浜�4鍊嬭嚭浣嶇殑銆�锛岀祼鍚堝伐绋嬬殑瀵﹂殯锛屾垜鍊戠法鍒朵簡鐩告噳鐨凱LC 閫氫俊绋嬪簭銆傜敱浜庣瘒骞呮湁闄愶紝鍙垪鍑洪儴鍒嗙▼搴�銆備絾鍦ㄧ法绋嬩腑闇€瑕佹敞鎰忕殑鏄紝绋嬪簭涓垏閫氳▕鏈夐棞鐨勯櫎浜嗛€茶鐩搁棞瀵勫瓨鍣ㄧ殑瑷疆涔嬪锛岄倓鎳夎┎灏嶆帴鍙楃殑鍛戒护閫茶鍒ゆ柗锛屽繁閬告搰閬嬭鐩搁棞鐨勭▼搴�銆傚彟澶�锛岀敱浜嶱LC 涓殑閫氳▕鍙f槸RS鈥�485閫氳▕鍙�锛屽叾鐐哄崐闆欎笂閫氳▕鍙�锛屾墍浠MT 鍜孯CV 鍛戒护涓嶈兘鍚屾檪閬嬭銆�
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PLC鐨勪腑鏂风▼搴�
LDB= SMB86, 16#20
LPS
MOVB 10, SMB34
ATCH INT1, 10
AB= 鈥楰鈥�, VB301
AB= 鈥楥鈥�, VB302
AB= 鈥�0鈥�, VB303
S Q0.0, 1
LRD
AB= 鈥楪鈥�, VB301
AB= 鈥楥鈥�, VB302
AB= 鈥�0鈥�, VB303
R Q0.0, 1
LRD
AB= 鈥楰鈥�, VB301
AB= 鈥楶鈥�, VB302
AB= 鈥�0鈥�, VB303
S Q0.1, 1
LRD
AB= 鈥楪鈥�, VB301
AB= 鈥楶鈥�, VB302
AB= 鈥�0鈥�, VB303
R Q0.1, 1
LPP
NOT
RCV VB300, 0
5 VB閫氫俊绋嬪簭瑷▓
VisualBasic 闁嬬櫦(f膩)鍖呮嫭鐣岄潰鐨勮ō瑷堝拰绋嬪簭鐨勯枊鐧�(f膩)鍏╅儴鍒嗐€�
5.1 浜烘鐣岄潰瑷▓
浜烘鐣岄潰浣跨敤鎴惰垏瑷堢畻姗熶箣闁撶殑涓粙锛屾槸杌熶欢鐢㈠搧鐨勭獥鍙�銆備汉姗熺晫闈㈤鍏堣€冩叜鐨勬槸濡備綍鑳芥洿濂界殑婊胯冻鐢ㄦ埗鐨勪娇鐢ㄨ姹傚拰鎿嶄綔缈掓叄銆備汉姗熺晫闈㈢殑瑷▓瑕佽€冩叜鐣岄潰鍔熻兘鐨勫叏闈㈠拰鎿嶄綔鐨勭啊渚裤€傛渶甯哥敤鐨勫姛鑳借鐩¢噺瀹夋帓鍦ㄤ富鐣岄潰涓�锛屽鏋滄湁澶氬€嬪姛鑳芥ā濉婏紝鍙互灏囧厛灏嶇崹绔嬬殑妯″鐢ㄥ柈鐛ㄧ殑鐣岄潰琛ㄧず锛屽苟鑸囦富鐣岄潰闆欏悜閫f帴銆傚鍦�3
鏈郴绲�(t菕ng)鐣岄潰鍖呮嫭鐙€鎱�(t脿i)鐨勭洠(ji膩n)鎺�銆佽韩浠界櫥闄�銆佸弮鏁歌ō瀹�銆佸牨琛ㄦ煡瑭�銆佹墦鍗�銆佸牨璀﹀拰浜嬩欢椤ず銆�
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鍦�3 浜烘鐣岄潰[/align]
瀹夊叏闁ユ埃瀵嗘€ф娓帶鍒剁郴绲�(t菕ng) 锛孷B閫氳▕鐣岄潰瑷▓鏅�锛� Mscomm 鎺т欢鐨勯噸瑕佸爆鎬цō缃偤锛�
InputMode 灞€э細comlnputModeBinary锛屾寜浜岄€插埗鏂瑰紡璁€鍙栨暩鎿氾紝鍥犵偤寰濸LC 杩斿洖鐨勬暩鎿氫腑鍖呮嫭ASCII纰煎€艰秴閬�128 鐨勫瓧绡€(ji茅)銆�
Settings 灞€э細9600锛宯锛�8锛�1锛岄伕鎿�9600bps娉㈢壒鐜�锛屼笉閫茶濂囧伓鏍¢锛�8 浣嶆暩鎿氫綅锛�1浣嶅仠姝綅锛屽叾瑷疆瑕佽垏PLC鐨勮ō缃竴妯�锛屾墠鑳芥甯搁€氫俊銆�
RThreshold 灞€э細1锛岀暥鎺ユ敹鍒�1鍊嬪瓧绗︽檪锛屽紩鐧�(f膩)OnComm浜嬩欢鐨凜omEvReceive 甯告暩銆�
5.2 閫氫俊绋嬪簭瑷▓
VB閫氫俊涓帴鏀朵簨浠剁殑绋嬪簭娓呭柈濡備笅
If MSComm1.CommEvent = comEvReceive Then
S1 = MSComm1.Input
If 锛圫1 = Chr锛�&H1B锛夛級 And 锛圠en锛圫COMS锛� > 5锛� Then
SCOMS = ""
Else
If S1 <> Chr锛�&HD锛� Then
SCOMS = SCOMS & S1
Else
Call MYSAVE锛圫COMS锛�
End If
End If
End If
VB閫氫俊涓垎閰嶈畩閲�
SCOMS = Trim锛圫COMS锛� 鈥樻帴鏀跺埌20鍊嬪瓧娈�
SCOMS = Right锛圫COMS, 20锛�
vh5 = Trim锛圡id锛圫COMS, 8, 4锛夛級 鈥樺鍔涘€肩殑瀛樻斁锛堝瓧绗︿覆锛�
yld1 = CCLng锛坴h5锛�
vh6 = Trim锛圡id锛圫COMS, 12, 1锛夛級 鈥樿嚜鍕曚俊铏�
zdd1 = vh6
vh7 = Trim锛圡id锛圫COMS, 13, 1锛夛級 鈥樺厖姘d俊铏�
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vh8 = Trim锛圡id锛圫COMS, 14, 1锛夛級 鈥樻帓姘d俊铏�
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