DSQC658 3HAC025779-001 ABB

I/O point is one of the most frequently heard terms when discussing control systems.It refers to the input/output point,I for INPUT,referring to input,O for OUTPUT,referring to output.Input/output refers to the control system,the input refers to the measured parameters from the instrument to the control system,the output refers to the parameters output from the control system to the actuator,and a parameter is called a point.A control system is sometimes sized according to the maximum number of I/O points it can control.

在讨论控制系统的时候，I/O点是最经常听到的一个术语。它是指输入/输出点，I代表INPUT，指输入，O代表OUTPUT，指输出。输入/输出都是针对控制系统而言，输入指从仪表进入控制系统的测量参数，输出指从控制系统输出到执行机构的参量，一个参量叫做一个点。一个控制系统的规模有时按照它最大能够控制的I/O点的数量来定的。