Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí
Ðû²¼ÈÕÆÚ£º
2022-04-11

Modbus RTU ÊÇÒ»ÖÖ´®ÐÐͨѶЭÒé £¬ÓÉÓÚ¾ßÓÐЭÒé͸Ã÷ £¬ÊµÏÖ±¾Ç®µÍ £¬¼òÆÓÒ×ÓõÈÖî¶àÌØµã £¬ÖÁ½ñÈÔÈ»ÆÕ±éÓ¦ÓÃÔÚ¹¤Òµ¿ØÖƵĸ÷¸öÁìÓò¡£

ΪÁËͨѶ¿ÉÒÔºã¾ÃÎȹ̵ÄÔËÐÐ £¬²¢ÇÒ¿ÉÒÔÔÚ¹ÊÕÏʱ¿ÉÒÔʵʱ´¦Öóͷ£ºÍÅŲé £¬ÌØÊáÀí´ËÎÄ £¬ÓÃ×ö²Î¿¼Ñ§Ï°Ê¹Óá£

Õï¶ÏÊÂÇéÒÔ S7-1200/S7-1500 PLCµÄ´®¿ÚͨѶÄ £¿éÉϵÄָʾµÆ×îÏÈ£º

1)Ä £¿é±¾Ì弯³É RX/TX LED ָʾµÆ £¬ÓÃÀ´Ö¸Ê¾´®¿ÚͨѶÄ £¿éµÄÐÅÏ¢ÊÕ·¢×´Ì¬¡£

2)TX ´ú±í·¢ËÍ £¬RX ´ú±íÎüÊÕ £¬ÀýÈç CM PtP RS422/RS485 HF ͨѶÄ £¿éµÄ LED ָʾµÆÈçͼ1Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ1 LEDָʾµÆ

ͨ¹ý RX/TX ָʾµÆµÄ״̬¿ÉÒÔ¿ìËÙ¶¨Î» Modbus RTU ͨѶ¹ÊÕÏ £¬²¢ÇÒÍŽá Modbus RTU ͨѶָÁî״̬´úÂë £¬¿ÉÒÔ¸ßЧÂʵؽâ¾öÔÚÏÖ³¡ÖÐÓöµ½µÄÖÖÖÖModbus RTU ͨѶÎÊÌâ £¬¹ÊÕÏÕï¶ÏÅжÏÁ÷³ÌÈçͼ 2 Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ2 ͨѶ¹ÊÕϵÄÅжÏÁ÷³Ìͼ


×÷Ϊ Modbus Ö÷Õ¾ £¬µ±Óë´ÓÕ¾×°±¸Í¨Ñ¶²»ÉÏʱ £¬´¥·¢Ö÷Õ¾Ö¸Áîºó £¬ÊӲ촮¿ÚͨѶÄ £¿éµÄ TX ָʾµÆÊÇ·ñÉÁׯ£º

1£©ÈôÊÇÉÁׯ £¬Ôò˵Ã÷³ÌÐòÒѾ­×¼È·Ö´ÐÐ £¬´ËʱÈôÊÇ RX ²»ÁÁ £¬Ôò¹ÊÕϵÄÅÐ¶ÏÆ«ÏòΪ½ÓÏß»ò´ÓÕ¾Ò»²à¡£ÈôÊÇ RX Ò²ÉÁׯ £¬Ôò²¶»ñÖ÷Õ¾Ö¸ÁîµÄ״̬´úÂë £¬Æ¾Ö¤´úÂëµÄÏêϸ¼ÄÒåÅŲé¹ÊÕÏÔµ¹ÊÔ­ÓÉ£»

2£©ÈôÊÇ´®¿ÚͨѶÄ £¿éµÄ TX ָʾµÆ²»ÉÁׯ £¬Ôò˵Ã÷³ÌÐò²¢Î´×¼È·Ö´ÐÐ £¬¹ÊÕÏÔµ¹ÊÔ­ÓÉÖ÷ҪƫÏòΪ±à³ÌÎÊÌâ £¬¼ì²é³õʼ»¯Ö¸ÁîºÍÖ÷Õ¾Ö¸ÁîÊÇ·ñ±à³Ì׼ȷ £¬²¢²¶»ñ³õʼ»¯Ö¸ÁîºÍÖ÷Õ¾Ö¸ÁîµÄ״̬´úÂë £¬Æ¾Ö¤´úÂëµÄÏêϸ¼ÄÒåÅŲé¹ÊÕÏÔµ¹ÊÔ­ÓÉ¡£

×÷Ϊ Modbus ´ÓÕ¾ £¬µ±ÓëÖ÷Õ¾×°±¸Í¨Ñ¶²»ÉÏʱ £¬ÊӲ촮¿ÚͨѶÄ £¿éµÄ RX ָʾµÆÊÇ·ñÉÁׯ£º

1£©ÈôÊÇÉÁׯ £¬Ôò˵Ã÷¿ÉÒÔÎüÊÕÖ÷Õ¾·¢À´µÄÐÂÎÅ¡£ÔÚÈ·ÈÏÖ÷Õ¾²ÎÊýÉèÖÃ׼ȷ֮ºó £¬¹ÊÕÏÖ÷ÒªÅÐ¶ÏÆ«ÏòΪ´ÓÕ¾µÄ±à³ÌÎÊÌâ £¬¼ì²é³õʼ»¯Ö¸ÁîºÍ´ÓÕ¾Ö¸ÁîÊÇ·ñ±à³Ì׼ȷ £¬²¢²¶»ñ³õʼ»¯Ö¸ÁîºÍ´ÓÕ¾Ö¸ÁîµÄ״̬´úÂë £¬Æ¾Ö¤´úÂëµÄÏêϸ¼ÄÒåÅŲé¹ÊÕÏÔµ¹ÊÔ­ÓÉ£»

2£©ÈôÊÇ´®¿ÚͨѶÄ £¿éµÄ RX ָʾµÆ²»ÉÁׯ £¬Ôò˵Ã÷Ä £¿é²¢Î´ÎüÊÕµ½À´×ÔÖ÷Õ¾µÄÈκÎÐÂÎÅ £¬¹ÊÕÏÔµ¹ÊÔ­ÓÉÖ÷ҪΪ½ÓÏß»òÖ÷Õ¾Ò»²à £¬Ðè¼ì²é½ÓÏßÊÇ·ñ׼ȷ¡¢Ö÷Õ¾ÊÇ·ñÒÑÀֳɯô¶¯µÈÎÊÌâ¡£

²¶»ñ״̬´úÂë


ÓÉÓÚ Modbus RTU ͨѶָÁîµÄ״̬´úÂë½öÒ»Á¬Ò»¸öɨÃèÖÜÆÚ £¬Ö±½ÓÔÚÏß¼à¿ØÎÞ·¨ÊµÊ±¿´µ½ £¬ÒÔÊÇÎÒÃÇ¿ÉÒÔ±àд³ÌÐò²¶»ñ´úÂë¡£

²¶»ñ´úÂëʾÀýÈçͼ3Ëùʾ¡£³õʼ»¯Ö¸Áî¡¢Ö÷Õ¾Ö¸Áî¡¢´ÓÕ¾Ö¸Áî¾ùÐè²¶»ñ״̬´úÂë¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ3 ²¶»ñ´úÂë


16#80C8

¸Ã´úÂë¼ÄÒåΪ£º´ÓÕ¾ÔÚÉèÖÃʱ¼äÄÚδÏìÓ¦ £¬ÐèÒª¼ì²éÊý¾Ý´«ÊäÂÊ¡¢ÆæÅ¼Ð£ÑéºÍ´ÓÕ¾µÄ½ÓÏßÇéÐΡ£

±¬·¢¸Ã´úÂëµÄ¿ÉÄÜÔµ¹ÊÔ­ÓÉ£º

¢Ù½ÓÏß¹ýʧ¡£

ÔÚÖ÷´ÓÕ¾½ÓÏßʱ £¬Ðí¶àÓû§Ï°¹ßÐԵĽ«×°±¸¼äµÄ A Óë A £¬B Óë B ÏàÁ¬ £¬½ø¶ø×é³É×ÜÏßʽ RS485 ÍøÂç £¬×Åʵ £¬×¼È··½·¨ÎªÆ¾Ö¤Õý¸º¾ÙÐÐ×éÍø £¬Ó¦½«×°±¸¼äµÄÕýÓëÕý £¬¸ºÓ븺ÏàÁ¬ £¬ÓÉÓÚ²¢·ÇËùÓÐ×°±¸µÄ A ΪÕý £¬B Ϊ¸º £¬Èç CB1241 ͨѶ°å £¬B ΪÕý £¬A Ϊ¸º £¬Èçͼ4Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ4 CB1241 ͨѶ½ÓÏß

16#81Ex

¸Ã´úÂë¾ùÖ¸Ïò×Ö·ûÖ¡¹ýʧ £¬Èç16#81EA£º×Ö·ûÖ¡¹ý¶Ì £¬16#81E2£º×Ö·ûÖ¡¹ýʧ¡£

±¬·¢¸Ã´úÂëµÄ¿ÉÄÜÔµ¹ÊÔ­ÓÉ£º

¢Ù? ×Ö·ûÖ¡ÉèÖùýʧ¡£

ÒÀ´Î¼ì²éÆðʼλ¡¢Êý¾Ýλ¡¢ÆæÅ¼Ð£Ñéλ¡¢Êý¾Ý´«ÊäËÙÂʺͿ¢ÊÂλ¸öÊýµÄÉèÖÃÊÇ·ñÒ»Ö¡£

ÆäÖÐ £¬¿¢ÊÂλµÄ¸öÊýÊÇÔÚ³õʼ»¯Ö¸ÁîµÄÅä¾° DB ¿éÖоÙÐÐÉèÖà £¬Ä¬ÒÔΪ1¸ö×èֹλ¡£Èçͼ5Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ5 Åä¾°DBÉèÖÃ


¢Ú ×Ö·û¼ä×î´ó×Ö·ûÑÓ³Ùʱ¼ä ¡°ICHAR_GAP¡±

ÔÚ Modbus RTU ¹æÔ¼ÖÐ £¬ Modbus RTU ±¨ÎÄÖ¡Ö®¼ä¾àÀ벻СÓÚ 3.5 ¸ö×Ö·ûʱ¼ä¡£Èçͼ6Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ6 Modbus RTU ±¨ÎÄÖ¡ÒÔ¼°¾àÀë

Î÷ÃÅ×Ó´®¿ÚͨѶÄ £¿éĬÈÏ Modbus RTU ±¨ÎÄÖ¡¿¢ÊµÄĬÈÏÌõ¼þΪ 3.5 ¸ö×Ö·ûʱ¼ä¡£

¼ÙÉè²¨ÌØÂÊΪ 9600 bit/s £¬1 ¸öÆðʼλ £¬1 ¸ö×èֹλ £¬8 ¸öÊý¾Ýλ £¬1 ¸öУÑéλ £¬Ôò 3.5 ¸ö×Ö·ûʱ¼äΪ£¨1/9600£©*1000*11*3.5=4 ms £¬²î±ð²¨ÌØÂÊ £¬¶ÔÓ¦µÄ×Ö·ûʱ¼ä²î±ð¡£

ÈôÊÇÓÉÓÚ»ï°éÏìӦʱ¼äÉÔ³¤¡¢Ïß·×迹½Ï´ó £¬»òÍâ½ç×ÌÈŵÈÎÊÌâ £¬Modbus RTU ±¨ÎÄÖ¡ÖеÄ×Ö·û¼äÑÓʱÁè¼Ý 3.5 ¸ö×Ö·ûʱ¼ä £¬Ôò PLC »áÎóÒÔΪ±¨ÎÄÖ¡¿¢Ê £¬µ«ÏÖʵ²¢Î´¿¢Ê £¬½ø¶ø±¬·¢¸ÃÀà¹ýʧ¡£

¿ÉÒÔÊʵ±Ôö´ó×Ö·û¼ä×î´ó×Ö·ûÑÓ³Ùʱ¼ä ¡°ICHAR_GAP¡± £¬×èÖ¹¸Ã¹ýʧµÄ±¬·¢ £¬Èçͼ7Ëùʾ¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ7 ×Ö·ûÑÓ³Ùʱ¼ä

16#8280/16#8281

¸Ã´úÂë¼ÄÒåΪ£º¶ÁÈ¡/дÈëÄ £¿éʱʧ°Ü £¬Çë¼ì²é Port ²ÎÊýµÄÊäÈë¡£

±¬·¢¸Ã´úÂëµÄ¿ÉÄÜÔµ¹ÊÔ­ÓÉ£º

¢Ù?³õʼ»¯Ö¸Áî Port ¹Ü½ÅÊäÈë¹ýʧ

³õʼ»¯Ö¸Áî Port ¹Ü½ÅÓ¦ÊäÈë´®¿ÚͨѶÄ £¿éµÄÓ²¼þ±êʶ·û £¬¹ýʧµÄÓ²¼þ±êʶ·û½«µ¼Ö³õʼ»¯Ê§°Ü¡£

¢Ú?δָ¶¨ÊÂÇéģʽ

Ó¦ÔÚ³õʼ»¯Ö¸ÁîµÄÅä¾° DB ¿é Mode ²ÎÊýÖÐ £¬Ö¸¶¨´®¿ÚͨѶÄ £¿éµÄÊÂÇéģʽ £¬Ä£Ê½ 4 Ϊ°ëË«¹¤£¨RS485£©Á½Ïßģʽ £¬Èçͼ 8 Ëùʾ £¬ÏÂÔØ³ÌÐòºó¶ÏµçÖØÆôÉúЧ¡£²î±ðµÄ Mode ÊýÖµ´ú±í²î±ðµÄÊÂÇéģʽ £¬Èç±í 1Ëùʾ¡£

¸ÃÉèÖýöÊÊÓÃÓÚ Modbus£¨RTU£©Ö¸Á £¬²»ÊÊÓà Modbus Ö¸Á¡£

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

ͼ8 DB¿éģʽ

Î÷ÃÅ×Ó S7-1200/1500 µÄ Modbus RTU ͨѶÕï¶Ï·ÖÏí

±í1 ÖÖÖÖģʽÁбí

×ܽ᣺ÒÔÉÏÄÚÈÝÊÇÕë¶Ô¾­³£·ºÆðµÄ S7-1200/1500 Modbus RTU ͨѶ¹ÊÕϵĴ¦Öóͷ£×ܽá £¬¸ü¶àÄÚÈݽӴýÓëÎÒÃǽ»Á÷¡£

ÉùÃ÷£º²¿·ÖÄÚÈÝȪԴÓÚÍøÂç £¬ÈçÇÖȨÇëºǫ́ÁôÑÔÁªÏµÉ¾³ý¡£