modbus协议全解，modicon公司编写的协议，很权威，很有参考价值。-modbus protocol the whole solution, modicon the company prepared an agreement, it is authoritative, useful reference value.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001295s ]
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:0.068454s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001158s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001287s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001082s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003194s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000876s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003345s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014889s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001396s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 233017 [ RunTime:0.014310s ]
