| functional unit that generates the manipulated variable at its output from the command variable in open-loop control and from the reference-variable and the feedback variable in closed-loop control SEE: Figures 1 and 2. Note 1 to entry: This entry was numbered 351-28-02 in IEC 60050-351:2006. 
Figure 1 – Functional diagram indicating typical elements of an elementary open-loop control system 
Figure 2 – Functional diagram indicating typical elements of an elementary closed-loop control system
|