通过此EXCEL可以创建好离线DB变量符号名及数据列初始值,生成源文件直接可以复制到项目中这样可以非常快捷的完成DB创建不像在step7中那样受到诸多限制.(Through this EXCEL, we can create off-line DB variable name and data column initial value, generate source files can be copied directly into the project, so that we can accomplish DB creation very quickly, unlike many restrictions in STEP7.)