FF现场总线是符合IEC61158标准的总线，侧重于过程控制自动化领域。
FF is accorded with the IEC61158 standard, it lays on the automation field of process control.
通用串行总线(usb)是目前PC外设接口的主流总线标准，并迅速在工业自动化仪器仪表中得到应用。
USB (Universal Serial bus) is a mainstream bus standard of PC peripheral interface, which extends its applications to industrial automatic instruments.
最初是为了满足离散制造工业需求而开发的PROFIBUS，目前已经演化成离散制造和流程自动化的现场总线标准。
Originally developed to meet the needs of the discrete manufacturing industry, PROFIBUS has evolved into a fieldbus standard for both discrete manufacturing and process automation.
但是现场总线领域至今没有形成一个统一的标准，自动化孤岛依然存在。
But so far, an authoritative standard has not been setup, isolation also exists in the field of automation.
但是现场总线领域至今没有形成一个统一的标准，自动化孤岛依然存在。
But so far, an authoritative standard has not been setup, isolation also exists in the field of automation.
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