MODBUS通信程序.可用于学习施耐得PLC通信、现在国产好多RTU都用MODBUS协议-MODBUS communications procedures. Learning can be used Shi able to endure PLC communications, now many domestic MODBUS RTU using agreement
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001218s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.068806s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001279s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001312s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000913s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002946s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000673s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003561s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.013219s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001088s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 168234 [ RunTime:0.016331s ]