Which option for an analog attribute allows the historized value to be properly displayed on a utility such as Historian Client Trend?

The option that enables the historized value of an analog attribute to be displayed appropriately on a utility like the Historian Client Trend is related to specifying the scale within which the data points will be presented. Utilizing "Trend High and Trend Low" ensures that the visualization tool can correctly plot the data by defining the upper and lower limits of the trend display.

By setting the Trend High and Trend Low parameters, users can control the graphical representation of the data, allowing for clear visual differentiation of values within the specified range. This is particularly important in trending applications, as it helps to highlight variability, trends, or unusual data points within the defined range, thus enhancing the overall analysis process.

The other options, while pertinent in certain contexts, do not specifically address how to configure an analog attribute for optimal trend display. Data Range typically refers to the overall span of data collection but does not dictate the limits for visualization in a trending context. Maximum and Minimum provide boundaries for data integrity or validation but lack the explicit purpose of setting display parameters for trending. Real-time Display focuses on immediate data visibility but does not facilitate the historical data representation necessary for trends, which require past data context over time.