电梯外呼设备在线升级设计  

Online Upgrade Design of Elevator Hall Equipment

作　　者：张杰建 党书东 张永生 Zhang Jiejian;Dang Shudong;Zhang Yongsheng(Hitachi Building Technology(Guangzhou)Co.,Ltd.,Guangzhou 510670,China)

机构地区：[1]日立楼宇技术(广州)有限公司,广州510670

出　　处：《机电工程技术》2023年第6期244-248,共5页Mechanical & Electrical Engineering Technology

摘　　要：为有效解决电梯外呼设备在使用现场进行程序升级的困难,设计电梯外呼设备程序在线升级方法。由于电梯外呼设备的硬件MCU资源缺乏,程序升级数据交换采取共用电梯的串行通信实现。为不影响电梯的其他通信设备,需增加满足在线升级的定制化协议,实现电梯控制板与电梯外呼设备的主从通信方式,以方便远程控制中心或工程PDA对升级进程的实时可控。Flash存储空间有限,不足以开设程序备份区,在升级过程中删除原程序后,对接收通信写入的数据进行双重检验保证正确;同时,在Boot程序中增加相应的程序检测机制,以避免升级失败导致外呼设备失去功能。以PIC18平台为例,由于中断向量不能重定向,采用编译器的宏定义实现固定跳转;通过整合Boot与App程序的Hex文件,解决MCU不能进行分区烧录程序的问题,并对外呼设备进行在线升级测试。结果表明:利用该方案能够成功进行外呼设备在线升级,升级成功率满足预期,该设计能有效解决当前外呼设备的程序升级困难。In order to solve the online upgrade difficulty of elevator hall equipment in field effectively,the method to upgrade program online is designed.Due to the limited MCU resource of elevator hall equipment,the common elevator serial communication is used to upgrade program and exchange data.To avoid influencing the other communication equipments of elevator,it is necessary to add a customized protocol to meets online upgrade to achive the master-slave communication goal that elevator main board communicate with hall equipment and make it convenient and controllable about long-distance control and PDA online upgrade.The limited Flash storage has no ability to create program backup sector,so after original program is deleted,it is need to check the received data to ensure correct;at the same time,the relevant check structure is add in Boot program to avoid disabling the hall equipment due to the failure of updated program.Taking the PIC18 as an example,due to the interrupt vector can’t be redirected,complier maro is used to definition to realize permanent jump;by combining Boot program with App program Hex files,the problem that MCU can’t be downloaded program according to different sectors is solved,and the hall equipments online upgrade is tested.The results show that by using the scheme,elevator hall equipment can be successfully upgraded online,the upgrade success rate meets the expectation,and by using the design,the current program upgrade difficulties of the outbound equipment can be effectively solved.

关 键 词：电梯外呼设备 在线升级 串行通信 PIC18 BOOT 

分 类 号：TU857[建筑科学] TP368.1[自动化与计算机技术—计算机系统结构]