针对EDPF-NT+分散控制系统（distributed control system, DCS）与第三方通讯的问题，提出了在系统中利用虚拟控制器建立任务，与第三方或多方系统进行基于Modbus RTU、Modbus TCP协议的通讯，并解决了通讯过程中经常遇到的问题。

According to the communication problems between EDPF-NT+ distributed control system (DCS) and third-party, this paper proposed a effective strategy that established a communication to third-party or multiparty based on Modbus RTU protocol or Modbus TCP protocol in EDPF-NT+ system, which could effectively solve communication problems frequently encountered in EDPF-NT + system.