现场总线及其特点优势是什么
发布日期:2025-01-02 15:28:37

现场总线是连接智能现场设备和自动化系统的全数字、双向、多站的通信系统。主要解决工业现场的智能化仪器仪表、控制器、执行机构等现场设备间的数字通信以及这些现场控制设备和高级控制系统之间的信息传递问题。简单说,现场总线就是以数字通信代替了传统的4-20mA模拟信号及普通开关量信号的传输。

现场总线的特点及优点有以下几种:

现场控制设备具有通信功能,便于构成工厂底层控制网络;通信标准的公开、一致,使系统具备开放性,设备间具有互可操作性;功能块与结构的规范化使相同功能的设备间具有互换性;控制功能下放到现场,使控制系统结构具备高度的分散性。

现场总线使自动控制设备与系统步入了信息网络的行列,为其应用开拓了更为广阔的领域;一对双绞线上可挂接多个控制设备,便于节省安装费用;节省维护开销;提高了系统的可靠性;为用户提供了更为灵活的系统集成主动权。

现场总线产品主要有:PROFIBUS、CAN、DeviceNet、FF、WorldFIP、HART、CC-Link、RS485/MODBUS

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