DLT645 构造函数

默认的无参构造函数
Default no-parameter constructor

指定地址域，密码，操作者代码来实例化一个对象，密码及操作者代码在写入操作的时候进行验证
Specify the address field, password, and operator code to instantiate an object, and the password and operator code are validated during write operations, which address field is a 12-character BCD code, for example: 149100007290