Description
大中型PLC系统应支持多种现场总线和标准通信协议(如TCP/IP),需要时应能与工厂管理网(TCP/IP)相连接,通信协议应符合ISO/IEEE通信标准,应是开放的通信网络。PLC系统的通信接口应包括串行和并行通信接口(RS232C/422A/423/40)、RIO通信口、工业以太网、常用dcs接口等;大中型PLC通信总线(含接口设备和电缆)应1:1冗余配置
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