Configure an XRS Control Chart

The XRS charts display trends of subgroup means (X bar), ranges (R) and standard deviations (s). The XRS chart operates similarly to a standard trend, but with additional SPC extra features. Each subgroup displays as a single node on the graph and consecutive nodes are linked by a line.

Each control chart has a central line and two control limits-upper and lower (UCL and LCL). Plant SCADA automatically calculates these SPC values at run-time. If you want to override the UCL and LCL you can do so by entering the Process Mean, Range, and Standard Deviation fields in SPC Tags.

To configure an XRS Control Chart:

1. Define the SPC Tags.

2. Create the page using an XRS template.

   Note: If you want to develop your own XRS template, the method is to copy and modify and existing template.

See Also

Configure a Capability Chart