XMR Chart
3 min
the xmr chart processor establishes a central line from a window of process data, then tracks the process against upper and lower control limits calculated from that line why use xmr chart use this processor to monitor a process for control chart style drift once a baseline has stabilized, for example, tracking a machine's baseline vibration level and flagging when it moves outside its expected range how it works once the window fills with values, the processor calculates a central line that stays constant going forward, along with moving ranges the difference between successive values average moving range the average of the moving ranges upper and lower natural process limits the central line, plus or minus the product of process limit multiplier and the average moving range the processor adjusts the central line if the current value falls outside the process limits multiple times in a row, or if multiple values in a row sit closer to either limit than to the central line if your input tag doesn't publish at a steady rate, use timer interval to publish a value on a fixed schedule instead of waiting for the next incoming event enter 0 to disable the timer if your input already publishes at the expected rate parameters parameter details window size the window (in seconds) over which the central line and other calculated fields are established process limit multiplier the factor used to calculate the upper and lower process limits influences the range within which the process is considered to be in control timer interval sets a timer (in milliseconds) that continuously publishes the output when no event triggers a calculation enter 0 to disable the timer related topics use the xmr chart function docid\ myhahjgkusa9bwngwvrj0