西门子CONT_C,PID调节。
http://www.ad.siemens.com.cn/productportal/Prods/published/Prog/Prog_4.2/Prog_4.2.html
http://www.ad.siemens.com.cn/productportal/Prods/published/Prog/Prog_4.1/Prog_4.1.html
http://www.ad.siemens.com.cn/productportal/Prods/published/300list/Prog_list4.html
西门子以太网通信
http://www.ad.siemens.com.cn/productportal/Prods/published/300list/Comm_list4.html
西门子搜答案
http://www.ad.siemens.com.cn/service/answer/NewHl/HlSearch.aspx?boardId=1029
西门子通信概览
http://www.ad.siemens.com.cn/productportal/Prods/published/300list/Comm_list1.html
太阳高度角概览
