Few national icons are as recognized and revered worldwide as the Statue of Liberty. So when you’re tasked with the job of updating this 19th century landmark, it’s not a job to be taken lightly.
塔电梯系统公司（TESI）被选为用新的最先进的设备代替雕像现有的紧急救援电梯。该项目只是该雕像计划的几个关键设施升级之一。新电梯专为紧急人员而设计，以便需要与遇险的人接触并取回遇险的人，以使EMT，消防员和其他服务人员进入该雕像。
为了支持该项目的控件设计部分，TESI使用了西门子TIA门户网站 - 一种工程框架，允许在部署前在计算机上设计自动化过程，以确保适当的设备集成和有效的功能。
The control system to be deployed on the emergency elevator includes the Siemens Fail Safe Safety CPU in the Simatic ET200S Safety PLC, various digital inputs and outputs, and the Siemens’ HMI comfort panel, all of which were designed and commissioned for the project using TIA Portal. The project also uses Profibus communication protocols and Profinet industrial Ethernet.
安全特性in the elevator’s control system include redundant systems that look at all aspects of the operation, says Brian Trapani, lead project engineer and developer of the PLC code and HMI screens for the application. Some of the operation functions addressed by the controller include “car speed, height, E-stop circuitry, and open and closed doors on the landing side and the car side. The CPU is always looking at E-stops, making sure there are no wire breaks or shorts, whether they are on or off. It helps keep our elevator safer for personnel to travel in.”
A unique aspect to TESI’s emergency elevator is its patented hydraulic rescue lowering system, which is integrated into the elevator’s safety mechanisms. Should the car lose power or something go wrong, a rider can lower the car to the next safe landing so that personnel can get off.
TESI总裁Todd Grovatt说：“高级高级激光定位系统监视机器在Hoistway中的位置非常准确。地点。”
特拉帕尼（Trapani）评论了TESI在自由雕像项目中使用TIA门户网站时，特别感谢您能够拖放到任何随附的库中拖放元素的能力。他说：“您可以将指令直接放到梯子网络上。交叉参考指南几乎包括任何输入/输出。您可以更轻松地组织功能块；您可以添加和删除硬件而不会丢失位置，因为因为您不喜欢'必须在一个程序中进行交叉引用，然后手动查看另一个程序，反之亦然。”
TIA门户允许工程师通过一个接口构建组合控制器，HMI和驱动器的完整系统。不管被编程的功能如何，TIA门户接口都保持相同的外观和感觉，并自动显示所有功能，属性和库。Trapani提到的“智能拖放”以及“标签的自动完成”之类的功能，验证设备集成并在编辑接口之间进行延续。
Trapani估计，TIA软件的功能使TESI能够在工程时间节省30％至40％的功能，并在调试阶段又节省了20％，这要归功于该软件的交叉引用功能。
最近与新泽西州帕特森的Liberty Elevator合作，将救援电梯系统的安装到雕像中。
Editor's note: Be sure to watch the video of this automation application. You can access it in the photo box at the top right of this article.
