Programmable logic controller remote operation system and method

The invention provides a programmable logic controller remote operation system and method, and the programmable logic controller can be operated via a host machine; the programmable logic controller remote operation system comprises an intelligent hardware, and a safe access gateway; the intelligent hardware comprises a first logging request unit and a first virtual network interface card; the host machine comprises a second logging request unit and a second virtual network interface card; the safe access gateway comprises a first logging authentication unit, a second logging authentication unit, and a data transfer unit. The intelligent hardware and the safe access gateway are added, so the host machine can remotely control the programmable logic controller, thus ensuring the safety, andimproving the debugging efficiency. 本发明提供了种远程操作可编程逻辑控制器的系统及方法，用于通过上位机对可编程逻辑控制器进行操作，所述包括智能硬件、安全接入网关；所述智能硬件包括第登录请求单元和第虚拟网卡，所述上位机包括第二登录请求单元和第二虚拟网卡，所述安全接入网关包括第登录认证单元、第二登录认证单元和数据转发单元。本发明通过智能硬件和安全接入网关，使得上位机可对可编程逻辑控制器进行远程操作，在保证安全性的同