Each I/O processor scans analog inputs (UIs) every 45 ms, storing 6 consecutive readings in a buffer for each input. At this 270 ms cycle, the highest and lowest values in each buffer are discarded, and the four remaining values are averaged. Each UI’s averaged value is then written into the concatenated IoStatus buffer that is read by the actrld process running on the JACE. This entire cycle repeats every 270 ms.