Ò»¡¢S7-1200Óë±äƵÆ÷µÄÅþÁ¬
1.1±¾Àý³ÌµÄϵͳÉèÖÃ
±¾Àý³ÌÖÐÓõ½µÄÓ²¼þ£ºS7-1200£¨CPU 1214C£©¡¢G120 ( ¿ØÖƵ¥Î»CU240B-2 )¡¢Ò»Ì¨×°ÓÐTIA PortalÈí¼þµÄPC»ú¡¢CM1241Ä£¿£¿£¿£¿é¡¢µçÔ´Ä£¿£¿£¿£¿é¡¢±ê×¼RJ45ÍøÏß¡£¡£¡£¡£
1.2 Ó²¼þÅþÁ¬
1.2.1Ó²¼þÁ¬Ïß
±¾Àý³ÌÖеÄÓ²¼þ¼äµÄ½á¹¹ÈçÏÂͼËùʾ£º

ͼ1-1
1.2.2 PLCÓë¿ØÖÆµ¥Î»Í¨Ñ¶¶Ë¿ÚÖ®¼äµÄÅþÁ¬
ÓõçÀ½«CU240B-2 Modbus ͨѶ½Ó¿ÚÓëPLCͨѶģ¿£¿£¿£¿éÅþÁ¬ÆðÀ´£¬£¬£¬£¬£¬ÈçÏÂͼËùʾ¡£¡£¡£¡£

ͼ1-2
¶þ¡¢±äƵÆ÷ÉèÖÃ
2.1 µØµãÉèÖÃ
¿ÉÒÔͨ¹ý¿ØÖƵ¥Î»Éϵĵص㿪¹Ø£¬£¬£¬£¬£¬Ò²¿ÉÒÔͨ¹ý²ÎÊý P2021 »ò STARTER ÖС°Control Unit / Communication / Field bus¡±Ò³ÃæÀ´È·¶¨±äƵÆ÷µÄ Modbus-RTU µØµã¡£¡£¡£¡£
Ö»ÓÐËùÓеص㿪¹Ø¶¼ÉèΪ¡°OFF¡±(0)ʱ£¬£¬£¬£¬£¬P2021 »ò STARTER ÖеÄÉèÖòÅÓÐÓᣡ£¡£¡£²»È»£¬£¬£¬£¬£¬Modbus-RTU µØµãΪµØµã¿ª¹ØËùÉèÖõĵص㡣¡£¡£¡£
2.2 ²ÎÊýÉèÖÃ
³ýÁËÉèÖõصãÖ®Í⣬£¬£¬£¬£¬»¹ÐèÒª¶ÔÆäËûһЩ±äƵÆ÷µÄͨѶ²ÎÊý¾ÙÐÐÉèÖ㬣¬£¬£¬£¬²Å¿ÉÒÔ¾ÙÐÐMODBUSͨѶ¡£¡£¡£¡£ÏêϸÐèÒªÉèÖõIJÎÊýÈç±í2-1Ëùʾ£º

±í2-1
Èý¡¢PLC×é̬ºÍ±à³Ì
3.1 ½¨ÉèÏîÄ¿
Ê×ÏȽ¨ÉèÒ»¸öÏîÄ¿£¬£¬£¬£¬£¬µã»÷½¨ÉèÐÂÏîÄ¿£¬£¬£¬£¬£¬ÊäÈëÃû³Æ£¬£¬£¬£¬£¬Â·¾¶µÈÐÅÏ¢¡£¡£¡£¡£
3.2 Ó²¼þ×é̬
ƾ֤ÐÂÊÖÉÏ·µÄÌáÐÑÊ×ÏÈÑ¡Ôñ×°±¸ºÍÍøÂ磬£¬£¬£¬£¬¾ÙÐÐÓ²¼þ×é̬¡£¡£¡£¡£
µã»÷Ìí¼ÓÐÂ×°±¸£¬£¬£¬£¬£¬Ìí¼ÓÏìÓ¦ÐͺŵÄ×°±¸£¬£¬£¬£¬£¬ÐÞ¸Ä×°±¸Ãû³Æ£¬£¬£¬£¬£¬Ñ¡Ôñ°æ±¾ºÅ£¬£¬£¬£¬£¬µã»÷Ìí¼Ó¡£¡£¡£¡£
ÔÚµ¯³öµÄ×°±¸ÓëÍøÂçµÄÓÒ²àÓ²¼þĿ¼ÖУ¬£¬£¬£¬£¬ÕÒµ½Í¨Ñ¶Ä£¿£¿£¿£¿é-µãµ½µã-CM1241(RS485)£¬£¬£¬£¬£¬¼ÓÈëCM1241ͨѶģ¿£¿£¿£¿é¡£¡£¡£¡£
Ë«»÷×°±¸ÊÓͼÖеÄRS485¶Ë¿Ú£¬£¬£¬£¬£¬ÉèÖö˿Ú×é̬¡£¡£¡£¡£
ÔÚ×ó²àµÄÏîÄ¿Ê÷-×°±¸-ÔÚÏß»á¼û-Broadcom NetXtreme¡£¡£¡£¡£¡£¡£¡£¡£¡£¡£¡£¡££¨±¾Àý³ÌPC»úËùʹÓõÄÍø¿¨£©£¬£¬£¬£¬£¬Ë«»÷¸üпÉʹÓõÄ×°±¸£¬£¬£¬£¬£¬ËÑË÷µ½ÅþÁ¬µÄ×°±¸¡£¡£¡£¡£
3.3 ±à³Ì
ÔÚ×ó±ßµÄ×°±¸ÖÐÕÒµ½S7-1200/³ÌÐò¿é£¬£¬£¬£¬£¬·¿ªÖ÷³ÌÐò£¨Main[OB1]£©¡£¡£¡£¡£ÔÚÓұߵÄÖ¸ÁîÀ¸ÀïÑ¡ÔñͨѶ/ͨѶ´¦Öóͷ£Æ÷/MODBUS£¬£¬£¬£¬£¬Ìí¼ÓMB_COMM_LOADºÍMB_MASTER¡£¡£¡£¡£
ÔÚµ¯³öµÄŲÓÃÑ¡ÏîÖУ¬£¬£¬£¬£¬½ç˵һ¸öÅä¾°Êý¾Ý¿é¡£¡£¡£¡£
ʹÓÃͬÑùµÄÒªÁ죬£¬£¬£¬£¬ÔÙ¼ÓÈëÒ»¸öMB_MASTERÄ£¿£¿£¿£¿é£¬£¬£¬£¬£¬Í¬Ñù½ç˵Åä¾°Êý¾Ý¿é¡£¡£¡£¡£
»®·ÖÉèÖÃMB_COMM_LOADºÍMB_MASTERÄ£¿£¿£¿£¿é¡£¡£¡£¡£
ÆäÖУ¬£¬£¬£¬£¬MB_COMM_LOADÓëMB_MASTERÖ¸ÁîµÄ²ÎÊý˵Ã÷£¬£¬£¬£¬£¬Çë²Î¿¼±í3-1£¬£¬£¬£¬£¬±í3-2¡£¡£¡£¡£

±í3-1 MB_COMM_LOADÖ¸ÁîµÄ²ÎÊý

±í3-2 MB_MASTERÖ¸ÁîµÄ²ÎÊý
3.4 ÏÂÔØ
±àÒ룬£¬£¬£¬£¬È·ÈÏÎÞÎóºó£¬£¬£¬£¬£¬µã»÷ÏÂÔØ¡£¡£¡£¡£ÔÚµ¯³öµÄ¡°À©Õ¹µÄÏÂÔØµ½×°±¸¡±ÖУ¬£¬£¬£¬£¬Ñ¡ÔñPG/PC½Ó¿ÚÀàÐÍ£¬£¬£¬£¬£¬ÒÔ¼°PG/PC½Ó¿Ú¡£¡£¡£¡£Ñ¡Ôñ×°±¸£¬£¬£¬£¬£¬²¢µã»÷ÏÂÔØ¡£¡£¡£¡£
ÔÚµ¯³öµÄÏÂÔØÔ¤ÀÀÖУ¬£¬£¬£¬£¬Éó²é½«ÒªÁýÕÖµÄÄÚÈÝ£¬£¬£¬£¬£¬Ñ¡ÔñͳһÏÂÔØ£¬£¬£¬£¬£¬²¢µã»÷ÏÂÔØ¡£¡£¡£¡£
3.5 ¼àÊÓ
µã»÷תµ½ÔÚÏߣ¬£¬£¬£¬£¬²¢µã»÷Æô¶¯¼àÊÓ£¬£¬£¬£¬£¬´Ëʱ¼´¿Éͨ¹ýPLC¸ø±äƵÆ÷¾ÙÐÐMODBUSͨѶ¡£¡£¡£¡£
ËÄ¡¢MODBUSͨѶ¿ØÖÆ±äÆµÆ÷
4.1 ʹÓÃMODBUSͨѶ¿ØÖÆ±äÆµÆ÷ÆôÍ£
ÈçÏÂͼËùʾ£¬£¬£¬£¬£¬·¿ªTag_1£¬£¬£¬£¬£¬Ê¹ÄÜMB_MASTER¡£¡£¡£¡£Ê¹ÄÜÍê³ÉÖ®ºó£¬£¬£¬£¬£¬¹Ø±ÕTag_1¡£¡£¡£¡£

ͼ4-1
Èçͼ4-2£¬£¬£¬£¬£¬½«MODE¸ÄΪ1£¨¼´Ð´ÈëÊý¾Ý£©£¬£¬£¬£¬£¬DATA_ADDRдÈë40101£¨Ö÷É趨ֵ¼Ä´æÆ÷ºÅ£©£¬£¬£¬£¬£¬DATA_PTRдÈë1000£¨¸ø¶¨ÖµµÄдÈëÖµ£©¡£¡£¡£¡£È»ºóREQʹÓÃÒ»¸öÂö³åÑØÀ´·¢Ë͸ø¶¨Öµ¡£¡£¡£¡£´Ëʱ£¬£¬£¬£¬£¬±äƵÆ÷µÄ¸ø¶¨ÖµÒѾ¸ÄΪ1000¡£¡£¡£¡£
È»ºó½«DATA_ADDRдÈë40100£¨¿ØÖÆ×ּĴæÆ÷ºÅ£©£¬£¬£¬£¬£¬DATA_PTRдÈë047E£¨Í£³µ£©£¬£¬£¬£¬£¬È»ºóREQʹÓÃÒ»¸öÂö³åÑØÀ´·¢ËÍÍ£³µÏÂÁî¡£¡£¡£¡£ÔÙ½«DATA_ADDRдÈë40100£¨¿ØÖÆ×ּĴæÆ÷ºÅ£©£¬£¬£¬£¬£¬DATA_PTRдÈë047F£¨Æô¶¯£©£¬£¬£¬£¬£¬È»ºóREQʹÓÃÒ»¸öÂö³åÑØÀ´·¢ËÍÆô¶¯ÏÂÁî¡£¡£¡£¡£

ͼ4-2
×¢ÖØ£º
MB_COMM_LOADʹÄÜÍê³ÉÖ®ºó£¬£¬£¬£¬£¬Ò»¶¨Òª½«Tag_1¹Ø±Õ£¬£¬£¬£¬£¬²»È»MB_MASTERÄ£¿£¿£¿£¿é½«ÎÞ·¨Ê¹Óᣡ£¡£¡£
±äƵÆ÷Æô¶¯Î»ÐèÒªÒ»¸öÉÏÉýÑØ£¬£¬£¬£¬£¬ÒÔÊÇÏȸøÆäÍ£³µÏÂÁ£¬£¬£¬£¬È»ºó·¢ËÍÆô¶¯ÏÂÁ£¬£¬£¬£¬Ê¹ÓÃÉÏÉýÑØÀ´Æô¶¯±äƵÆ÷¡£¡£¡£¡£
4.2 ʹÓÃMODBUSͨѶÐ޸ĺÍÉó²é±äƵÆ÷²ÎÊý
ÏÖÔÚ£¬£¬£¬£¬£¬ÒÔ²ÎÊýP1120¼ÓËÙʱ¼äΪÀý£¬£¬£¬£¬£¬¶Ô²ÎÊýµÄÐ޸ĺÍÉó²é¾ÙÐнâ˵¡£¡£¡£¡£
Ê×ÏÈ£¬£¬£¬£¬£¬¾ÙÐжÁ²ÎÊýµÄÑÝʾ¡£¡£¡£¡£½«MODEÊäÈë¸ÄΪ0£¨¼´¶Á²ÎÊýģʽ£©£¬£¬£¬£¬£¬½«DATA_ADDRÖÐдÈë40322£¨¼´¼ÓËÙʱ¼äµÄ¼Ä´æÆ÷ºÅ£©£¬£¬£¬£¬£¬È»ºóREQʹÓÃÂö³åÑØÀ´·¢ËÍÒ»¸ö¶ÁÇëÇ󡣡£¡£¡£´Ëʱ£¬£¬£¬£¬£¬¿ÉÒÔÎüÊÕµ½²ÎÊýP1120ÖеÄÊý¾Ýλ1000£¨¼´¼ÓËÙʱ¼äΪ10s£©¡£¡£¡£¡£
È»ºó¾ÙÐÐд²ÎÊý£º½«MODEÊäÈë¸ÄΪ1£¨¼´Ð´²ÎÊýģʽ£©£¬£¬£¬£¬£¬½«DATA_ADDRÖÐдÈë40322£¨¼´¼ÓËÙʱ¼äµÄ¼Ä´æÆ÷ºÅ£©£¬£¬£¬£¬£¬ÔÚDATA_PTRÖÐдÈë500£¬£¬£¬£¬£¬È»ºóREQʹÓÃÂö³åÑØÀ´·¢ËÍÒ»¸öдÇëÇ󡣡£¡£¡£´Ëʱ£¬£¬£¬£¬£¬ÒѾ½«500дÈëÁ˲ÎÊýP1120Ö®ÖУ¬£¬£¬£¬£¬¼ÓËÙʱ¼ä¸ÄΪ5s¡£¡£¡£¡£
¿ØÖƵ¥Î»ÖÐµÄ Modbus ¼Ä´æÆ÷ºÍ¶ÔÓ¦µÄ²ÎÊýÈçϱíËùʾ£º


±í4-1 Modbus ¼Ä´æÆ÷ºÍ¶ÔÓ¦µÄ²ÎÊý