利用MODBUS报文逆向复原数据采集程序

Reverse reconstruction of data acquisition programs using MODBUS messages

PLC原程序是信息化维护时所需的重要文件,缺少原程序就无法在原有程序的基础上新增仪表设备数据采集与控制程序。通过对MODBUS RTU协议的报文进行拦截和解析,复原了PLC程序,在坪北经理部解决P120平台南大傲拓NA400 PLC原程序缺失问题。此方法为今后信息化故障处理提供了新的思路。

The original PLC program is crucial for information technology(IT)maintenance.Without it,adding new data acquisition and control programs for instruments becomes impossible.By intercepting and analyzing MODBUS RTU protocol messages,the PLC program was reconstructed,resolving the missing program issue for the P120 platform's Nanda Atekon NA400 PLC in the Pingbei Management Department.This approach provides a new solution for future IT troubleshooting.