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McDonald’s HEMS II page 18
Data Logging and Trended Points
1. The following points are all selectable from the Home and/or HVAC Unit graphic pages by touching or
clicking on the numeric value ( CYAN background color) shown for each: OSA Temperature (Outside Air
Temperature), Peak Electrical Demand, KWH Monthly (monthly electrical consumption), KWH Yearly
(yearly electrical consumption), Freezer (temperature), Cooler (temperature), Space Temp (space
temperature for each area of building) and DA Temp (discharge or supply air temperature from each HVAC
Unit).
2. The information above shows the Cooler temperature as an example. Note that in the upper left hand corner
a time range can be selected from a drop down menu. You can elect to review the trend information by
specifying a certain time range or values for Today, Last 24 Hours, Yesterday, Week-to-Date, Last Week,
Last 7 days, Month-to-Date, Last Month, Year-To-Date (data may not be available for this time period) and
Last Year (data may not be available for this time period). See item 5 below.
3. You can also place your finger or mouse at any point on the graphic line to see what an exact value was and
the exact date and time that value was recorded.
4. Note that each point is trended or logged every 60 minutes, 24 hours per day, 365 days per year. The
exception is Peak Demand which is recorded every 15 minutes, 24 hours per day, 365 days per year and
KWH Monthly and KWH Yearly which are continuously recorded.
5. Also note that the WEBs controller has a limited amount of internal memory for holding and retaining logged
or trended values. When this internal memory is full, older data values are overwritten by new recorded
values. With this in mind you may not able to read data values from a long time ago. Typically the WEBs unit
will retain the last 7-30 days of trended or logged data for each point. Honeywell offers a service that
automatically retrieves and retains long term trended or logged data for you, as long as, a continuous internet
connection to the WEBs unit is available. Consult with your Honeywell salesperson on the costs associated
with additional service.