怎样提高RS485总线通信速度？ 如何提高RS485总线系统的可靠性
RS485\u901a\u8baf\u901f\u7387\u5982\u4f55\u53ef\u4ee5\u505a\u52301Mbps\u4ee5\u4e0a\u548c\u901a\u4fe1\u8ddd\u79bb\u53ca\u4f20\u8f93\u7ebf\u54c1\u8d28\u6709\u5173\u5427\u3002
----------------------\u5ef6\u4f38\u9605\u8bfb------------------
\u9009\u62e9\u5de5\u4e1a\u901a\u8baf\u7535\u7f06\uff0c\u9996\u5148\u6ee1\u8db3\u963b\u6297\uff08Z0=120\u03a9\uff09\u5339\u914d\uff0c\u7136\u540e\u6839\u636e\u5177\u4f53\u7684\u901a\u4fe1\u901f\u7387\u3001\u4f20\u8f93\u8ddd\u79bb\u3001\u5e03\u7ebf\u73af\u5883\u3001\u6577\u8bbe\u65b9\u5f0f\u914d\u7f6e\u4e0d\u540c\u7684\u578b\u53f7\u89c4\u683c\u3002
\u5f88\u591a\u4eba\u7528RVVPS\u3001RVVP\u3001RVSP\u3001KVVP\u7b49\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u4ecb\u8d28\u7684\u7535\u7f06\u4f20\u8f93\u6570\u5b57\u4fe1\u53f7\uff0c\u8fd9\u662f\u9519\u8bef\u7684\uff01\u6309\u7167\u5b57\u6bcd\u89e3\u91ca\uff1a
RVV\u2014\u2014\u94dc\u82af\u5bfc\u4f53\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u53ca\u62a4\u5957\u8f6f\u7535\u7f06 \u65e0\u5c4f\u853d\u3002
RVVPS\u2014\u2014\u94dc\u82af\u5bfc\u4f53\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u53ca\u62a4\u5957\u94dc\u4e1d\u7f16\u7ec7\u603b\u5c4f\u853d\u8f6f\u7535\u7f06\u3002
RVSP\u2014\u2014\u94dc\u82af\u5bfc\u4f53\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u7ede\u578b\u94dc\u4e1d\u7f16\u7ec7\u5c4f\u853d\u7535\u7ebf \u65e0\u62a4\u5957\u3002
KVVP\u2014\u2014\u94dc\u82af\u5bfc\u4f53\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u53ca\u62a4\u5957\u94dc\u4e1d\u7f16\u7ec7\u603b\u5c4f\u853d\u63a7\u5236\u7535\u7f06\u3002
\u603b\u6240\u5468\u77e5\uff1a\u867d\u7136\u4ef7\u683c\u4f4e\u5ec9\uff0c\u4f46\u805a\u6c2f\u4e59\u70efPVC\u5374\u7cfb\u9ad8\u8870\u51cf\u6750\u6599\u3002\u52a0\u4e0a\u7535\u7f06\u8fd9\u7c7b\u7535\u7f06\u672c\u8eab\u4ec5\u8003\u8651\u4e86\u7535\u963b\u3001\u8010\u538b\u3001\u8f7d\u6d41\u91cf\u7b49\u4e00\u6b21\u53c2\u6570\uff0c\u6240\u4ee5\uff0c\u82e5\u6309\u7167\u4f20\u8f93\u7ebf\u65b9\u7a0b\u6765\u8003\u8651\uff0c\u8fd9\u4e9b\u662f\u4e0d\u80fd\u6ee1\u8db3\u901a\u4fe1\u8981\u6c42\u7684\u3002\u4f4e\u901f\u3001\u77ed\u8ddd\u79bb\u6216\u8bb8\u53ef\u4ee5\uff0c\u4f46\u9ad8\u901f\u3001\u957f\u7ebf\u3001\u591a\u8282\u70b9\u603b\u7ebf\u901a\u4fe1\u65f6\uff0c\u5219\u5f88\u96be\u80dc\u4efb\uff0c\u6b64\u65f6\u5e94\u91c7\u7528\u963b\u6297\u5339\u914d\u7684\u73b0\u573a\u603b\u7ebf\u7535\u7f06\u3002
\u73b0\u573a\u603b\u7ebf\u7535\u7f06\u662f\u6309\u7167\u4f20\u8f93\u7ebf\u65b9\u7a0b\u6765\u8bbe\u8ba1\u7684\uff0c\u5177\u6709\u7279\u6027\u963b\u6297\u3001\u8870\u51cf\u503c\u7b49\u4e8c\u6b21\u53c2\u6570\u8981\u6c42\u7684\u4f20\u8f93\u5143\u4ef6\u3002
\u203b \u901a\u7528\u578b\u73b0\u573a\u603b\u7ebf\u7cfb\u5217\u7535\u7f06
(\u4e13\u5229\u53f7\uff1a2010 2 0559128.9\u8c28\u9632\u5047\u5192)
\u7279\u6027\u963b\u6297\u4e3a120\u03a9\u7684\u53cc\u7ede\u5c4f\u853d\u7535\u7f06\u5e7f\u6cdb\u7528\u4e8eRS485/422\u3001CANBUS\u7b49\u603b\u7ebf\uff0c\u8be5\u7cfb\u5217\u7535\u7f06\u89c4\u683c\u5f88\u591a\uff0c\u8bf7\u63d0\u4f9b\u7535\u7f06\u7684\u6577\u8bbe\u73af\u5883\u3001\u901a\u4fe1\u901f\u7387\u3001\u6700\u5927\u65e0\u4e2d\u7ee7\u4f20\u8f93\u8ddd\u79bb\u7b49\u53c2\u6570\uff0c\u6211\u4eec\u5c06\u4f9d\u7167\u5177\u4f53\u60c5\u51b5\u63a8\u8350\u6700\u9002\u5f53\u7684\u4ea7\u54c1\u3002\u4e00\u822c\u63a8\u8350\u5982\u4e0b\uff1a
\u975e\u94e0\u88c5\u53cc\u7ede\u5c4f\u853d\u578b\u7535\u7f06 STP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 20 AWG \uff0c\u7535\u7f06\u5916\u5f847.7mm\u5de6\u53f3\uff0c\u84dd\u8272\u62a4\u5957\u3002\u9002\u7528\u4e8e\u5ba4\u5185\u3001\u7ba1\u9053\u53ca\u4e00\u822c\u5de5\u4e1a\u73af\u5883\u3002\u4f7f\u7528\u65f6\uff0c\u5c4f\u853d\u5c42\u4e00\u7aef\u63a5\u5730\uff01
\u975e\u94e0\u88c5\u53cc\u7ede\u5c4f\u853d\u578b\u7535\u7f06 STP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 18 AWG \uff0c\u7535\u7f06\u5916\u5f848.2mm\u5de6\u53f3\uff0c\u7070\u8272\u62a4\u5957\u3002\u9002\u7528\u4e8e\u5ba4\u5185\u3001\u7ba1\u9053\u53ca\u4e00\u822c\u5de5\u4e1a\u73af\u5883\u3002\u4f7f\u7528\u65f6\uff0c\u5c4f\u853d\u5c42\u4e00\u7aef\u63a5\u5730\uff01
\u94e0\u88c5\u578b\u53cc\u7ede\u5c4f\u853d\u7535\u7f06 ASTP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 18 AWG \uff0c\u7535\u7f06\u5916\u5f8412.3mm\u5de6\u53f3\uff0c\u9ed1\u8272\u62a4\u5957\u3002\u53ef\u7528\u4e8e\u5e72\u6270\u4e25\u91cd\u3001\u9f20\u5bb3\u9891\u7e41\u4ee5\u53ca\u6709\u9632\u96f7\u3001\u9632\u7206\u8981\u6c42\u7684\u573a\u6240\u3002\u4f7f\u7528\u65f6\uff0c\u5efa\u8bae\u94e0\u88c5\u5c42\u4e24\u7aef\u63a5\u5730\uff0c\u6700\u5185\u5c42\u5c4f\u853d\u4e00\u7aef\u63a5\u5730\uff01
\u53d8\u9891\u5668\u3001\u52a8\u529b\u7535\u7f06\u3001\u53d8\u538b\u5668\u3001\u5927\u529f\u7387\u7535\u673a\u7b49\u5f80\u5f80\u4f34\u968f\u7740\u4f4e\u9891\u5e72\u6270\uff0c\u800c\u8fd9\u79cd\u5e72\u6270\u662f\u7528\u9ad8\u5bfc\u7535\u7387\u6750\u6599\u505a\u5c4f\u853d\u5c42\u7684\u7535\u7f06\u65e0\u6cd5\u89e3\u51b3\u7684\uff0c\u5305\u62ec\u539f\u88c5\u7684\u8fdb\u53e3\u7535\u7f06\u3002\u53ea\u6709\u7528\u9ad8\u5bfc\u78c1\u7387\u6750\u6599\uff08\u5982\u94a2\u5e26\u3001\u94a2\u4e1d\uff09\u505a\u7684\u5c4f\u853d\u5c42\u624d\u80fd\u6709\u6548\u6291\u5236\u4f4e\u9891\u5e72\u6270\u3002
\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u5c31\u662f\u7ed9\u7535\u7f06\u5957\u4e0a\u94a2\u7ba1\u6216\u76f4\u63a5\u91c7\u7528\u9ad8\u5bfc\u78c1\u7387\u6750\u6599\u5236\u6210\u7684\u94e0\u88c5\u578b\u7535\u7f06\u2014\u2014ASTP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 18 AWG \uff0c\u7535\u7f06\u5916\u5f8412.3mm\u5de6\u53f3\u3002\u53ef\u7528\u4e8e\u5e72\u6270\u4e25\u91cd\u3001\u9f20\u5bb3\u9891\u7e41\u4ee5\u53ca\u6709\u9632\u96f7\u3001\u9632\u7206\u8981\u6c42\u7684\u573a\u6240\u3002\u4f7f\u7528\u65f6\uff0c\u5efa\u8bae\u94e0\u88c5\u5c42\u4e24\u7aef\u63a5\u5730\uff0c\u6700\u5185\u5c42\u5c4f\u853d\u4e00\u7aef\u63a5\u5730\uff01
\u6237\u5916\u6577\u8bbe\u7535\u7f06\u9632\u96f7\u5f88\u91cd\u8981\uff01\u96f7\u7535\u7684\u7b49\u6548\u5e72\u6270\u9891\u7387\u5728100k\u5de6\u53f3\uff0c\u4e5f\u5c5e\u4e8e\u4f4e\u9891\u5e72\u6270\u3002
\u300aGB50057-94\u5efa\u7b51\u7269\u9632\u96f7\u8bbe\u8ba1\u89c4\u8303\u300b\u7b2c6.3.1\u6761\uff1a......\u5728\u9700\u8981\u4fdd\u62a4\u7684\u7a7a\u95f4\u5185\uff0c\u5f53\u91c7\u7528\u5c4f\u853d\u7535\u7f06\u65f6\u5176\u5c4f\u853d\u5c42\u5e94\u81f3\u5c11\u5728\u4e24\u7aef\u5e76\u5b9c\u5728\u9632\u96f7\u533a\u4ea4\u754c\u5904\u505a\u7b49\u7535\u4f4d\u8fde\u63a5\uff0c\u5f53\u7cfb\u7edf\u8981\u6c42\u53ea\u5728\u4e00\u7aef\u505a\u7b49\u7535\u4f4d\u8fde\u63a5\u65f6\uff0c\u5e94\u91c7\u7528\u4e24\u5c42\u5c4f\u853d\uff0c\u5916\u5c42\u5c4f\u853d\u6309\u524d\u8ff0\u8981\u6c42\u5904\u7406\u3002
\u300aGB 50217-2007\u7535\u7f06\u8bbe\u8ba1\u89c4\u8303\u300b\u4e5f\u6709\u7c7b\u4f3c\u7684\u8868\u8ff0\uff0c\u641c\u7d22\u201c\u5de5\u4e1a\u81ea\u52a8\u5316\u7cfb\u5217\u7efc\u5408\u7535\u7f06\u89e3\u51b3\u65b9\u6848\u201d\u8fdb\u5165\u4e2d\u56fd\u5de5\u63a7\u7f51\u8bba\u575b\u67e5\u770b\u3001\u4ea4\u6d41\u3002
\u5f71\u54cdRS485\u603b\u7ebf\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u901a\u5e38\u662f\u4ee5\u4e0b4\u70b9\uff1a
1.\u5e94\u7528\u73af\u5883\u3002\u7279\u522b\u662f\u5728\u6709\u7535\u673a\u6216\u5927\u578b\u8bbe\u5907\u7684\u73af\u5883\uff0c\u975e\u5e38\u5bb9\u6613\u53d7\u5230\u5e72\u6270\uff0c\u6b64\u7c7b\u5e72\u6270\u901a\u5e38\u662f50Hz\u3002
2.\u63a5\u5730\u95ee\u9898\u3002\u5982\u679c\u63a5\u6536\u7aef\u4e0e\u53d1\u9001\u7aef\u5728\u4e0d\u540c\u7684\u5730\u70b9\uff0c\u6216\u95f4\u63a5\u63a5\u5730\uff0c\u4e5f\u4f1a\u5bb9\u6613\u53d7\u5230\u5171\u6a21\u5e72\u6270\u3002\u8868\u73b0\u4e3a\u63a5\u6536\u4fe1\u53f7\u65f6\u6709\u65f6\u65e0\uff0c\u751a\u81f3\u4e00\u76f4\u65e0\u6cd5\u63a5\u6536\u3002\u6216\u8005\uff0c\u6536\u53d1\u76f8\u8ddd\u4e00\u7c73\u4fbf\u65e0\u6cd5\u5b9e\u73b0\u6570\u636e\u63a5\u6536\u7b49\u73b0\u8c61\u3002
3.\u5339\u914d\u95ee\u9898\u3002\u7aef\u53e3\u963b\u6297\u5339\u914d\u4e0d\u5408\u7406\u3002\u6bd4\u5982\u4fe1\u53f7\u7ebf\u7f06\u592a\u957f\uff0c\u592a\u591a\u661f\u5f62\u63a5\u7ebf\uff0c\u8d1f\u8f7d\u592a\u591a\u3001\u6ca1\u6709\u5339\u914d\u7535\u963b\u7b49\u539f\u56e0\uff0c\u5bfc\u81f4\u4fe1\u53f7\u65f6\u597d\u65f6\u574f\u4e0d\u80fd\u7a33\u5b9a\u5de5\u4f5c\u3002
4.\u7aef\u53e3\u6ca1\u505a\u6d6a\u6d8c\u9632\u62a4\u3002\u7531\u4e8e\u7528\u6237\u5e03\u7ebf\u4e0d\u89c4\u8303\uff0c485\u7ebf\u7f06\u611f\u5e94\u5230\u7535\u6d6a\u6d8c\uff1b\u6216\u7ebf\u7f06\u5728\u5ba4\u5916\uff0c\u5bb9\u6613\u611f\u5e94\u5230\u96f7\u51fb\u7535\u6d41\u3002
\u4e0d\u540c\u7684\u95ee\u9898\u8981\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u662f\u5e72\u6270\u95ee\u9898\u5bfc\u81f3\u7cfb\u7edf\u4e0d\u7a33\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u8bd5\u4e0b\u7528\u9694\u79bb\u7535\u8def\u5c06485\u7aef\u53e3\u9694\u79bb\u5f00\u6765\u3002\u4ee5\u4e0b\u662f485\u9694\u79bb\u7535\u8def\u56fe\uff1a
总之要根据具体的情况，才能确定波特率提高多少才合适。
设置 更高 的 波特率
绛旓細涓ユ牸鎰忎箟鏉ヨ锛RS-485鎬荤嚎浣跨敤浣曠鎷撴墤缁撴瀯涓嶄細褰卞搷閫氫俊閫熺巼锛屼絾鏄槦鍨嬫嫇鎵戞垨鑰呮爲褰㈡嫇鎵戠粨鏋勫鏋滃湪涓嶅鍔485闆嗙嚎鍣ㄦ垨鑰485涓户鍣ㄧ殑鎯呭喌涓嬶紝寰堝鏄撳舰鎴愪俊鍙峰弽灏勶紝瀵艰嚧閫氫俊澶辫触锛屼粠鑰屼娇寰椾富鏈洪渶瑕佷笉鏂殑閲嶅彂锛屽奖鍝嶉氫俊鏁堢巼鐢氳嚦涓嶈兘姝ｅ父閫氫俊銆傚缓璁綘濡傛灉涓瀹氳閲囩敤鏄熷瀷鎷撴墤缁撴瀯锛屾渶濂芥槸浣跨敤485闆嗙嚎鍣ㄤ繚璇侀氫俊绋冲畾鎬...
绛旓細鏍规嵁鎻忚堪1锛屼綘鐨勮缃槸濂界殑銆備笉澶槑鐧戒綘鐨勫悗鍙版槸鎸囦粈涔堛傞棶棰樺簲璇ュ嚭鍦紝鍚庡彴涓庤缃閫氳鐨鎺ユ敹锛屽悗鍙板仛涓绘満锛屽彂閫佸畬鎴愶紝鍒囨崲鍒版帴鏀舵柟鍚戯紝鍒囨崲涓嶅強鏃讹紝閫犳垚鏁版嵁鎺ユ敹寤惰銆傝瘯璇曚笅闈㈢殑鏂规硶锛岄檷浣庢尝鐗圭巼銆備粠鏈鸿缃垏鎹㈠埌鍙戦佷箣鍓嶏紝鍔犱竴鐐瑰欢鏃躲傚姞蹇富鏈哄彂閫佸畬鍒囨崲鍒版帴鏀剁殑閫熷害锛鎬荤嚎鎺ュ亸缃數闃伙紝纭繚涓绘満鍒囨崲鍒...
绛旓細7銆3銆RS485鍐呴儴鐨勭墿鐞嗙粨鏋勶紝閲囩敤鐨勬槸骞宠 椹卞姩鍣ㄥ拰宸垎鎺ユ敹鍣ㄧ殑缁勫悎锛屾姉骞叉壈鑳藉姏涔熷ぇ澶у鍔犮8銆4銆佷紶杈撹窛绂绘渶杩滃彲浠ヨ揪鍒1200绫冲乏鍙筹紝浣嗘槸瀹冪殑浼犺緭閫熺巼鍜屼紶杈撹窛绂绘槸鎴愬弽姣旂殑锛屽彧鏈夊湪100Kb/s浠ヤ笅鐨勪紶杈閫熷害锛屾墠鑳借揪鍒版渶澶х殑閫氫俊璺濈锛屽鏋滈渶瑕佷紶杈撴洿杩滆窛绂诲彲浠ヤ娇鐢ㄤ腑缁с9銆5銆佸彲浠ュ湪鎬荤嚎涓婅繘琛岃仈缃戝疄鐜板...
绛旓細妫鏌ユ帴鍦扮數闃汇佹帴鎻掍欢锛屾槸鍚︽帴瑙︿笉鑹紵---鈥---鈥---鈥--- 涓嬪垪寤鸿甯屾湜浼氭湁鎵甯姪锛1.閲囩敤闃绘姉鍖归厤銆佷綆琛板噺鐨RS485涓撶敤鎬荤嚎鐢电紗(鈽嗕笓鈽嗗埄鈽嗗彿鈽2010 2 0559128.9)鏇存湁鍒╀簬淇濊瘉閫氫俊銆備竴鑸帹鑽愬涓嬶細鏅氬弻缁炲睆钄藉瀷鐢电紗 STP-120惟锛坒or RS485 & CAN锛 one pair 20 AWG 锛岀數缂嗗寰7.7mm宸﹀彸銆
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绛旓細RS485閫氳甯冪嚎瑙勮寖鍙婄粡楠屾荤粨 RS-485鏍囧噯[1]瀹氫箟浜嗕竴涓熀浜庡崟瀵瑰钩琛＄嚎鐨勫鐐广佸弻鍚戯紙鍗婂弻宸ワ級閫氫俊閾捐矾锛屾槸涓绉嶆瀬涓虹粡娴庛佸苟鍏锋湁鐩稿綋楂樺櫔澹版姂鍒躲佷紶杈閫熺巼銆佷紶杈撹窛绂诲拰瀹藉叡妯¤寖鍥寸殑閫氫俊骞冲彴銆傛垜浠鏍℃牎鍥竴鍗￠氱郴缁熶腑鐨勯鍫傛秷璐瑰瓙绯荤粺锛屽氨鏄噰鐢≧S-485鎬荤嚎灏嗗悇娑堣垂POS鏈鸿繛鎺ュ湪涓璧枫1鏍″洯涓鍗￠氱郴缁烺S-...
