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Control algorithms, continued

Control algorithms used by eight photosensors
The following graphs show the measured control algorithms for photosensors from eight different manufacturers. All graphs plot the open-loop response (output as a function of input) as discussed in the section How control algorithms are characterized. The multiple lines on each graph correspond to different adjustment settings on the photosensor. That is, a single line represents the response for a particular setting. For all photosensors, except #8, the different curves cover the full range of the adjustment settings. Photosensor #8 is unique in that the control algorithm is not only dependent on the commissioning adjustment settings, but also on the light level detected during the commissioning process. Because of this, the full range of response functions is difficult to determine and the graph shows the response functions only over a limited range.



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