User's Guide

18 A c l a r a R F E l e c t r i c I - 2 1 0 + c U s e r G u i d e
Supported Messages
Daily Shifted and Interval Messages
The following image shows a typical day in the life of a meter. (However, other
messages are possible. These are shown in separate drawings.)
Figure 5.1 Daily Shift and Interval Data Messages
Typically, every day at midnight (the default daily shift time) the day begins with a
series of “daily shifted” readings. These readings are described on the customer
configuration worksheet with the “DS” designation.
All throughout the day the meter is collecting LP data. In the Aclara RF Network
I-210+c, the LP data collected is specified by the meter program. The Aclara RF
Network NIC will discover how the meter is programmed and send every
programmed channel up to the headend in periodic intervals. By default,
15-minute interval data is collected and transmitted every 15 minutes. However, it
is possible to batch the data into larger groups and send the interval data less
frequently. Intervals of energy readings are typically reported as incremental
(delta) values, while channels of temperature and voltage are reported as absolute
values. Generally speaking, it is a good idea to ensure that every channel of delta
data sent in as interval data has a corresponding absolute value which is
transmitted in the Daily Shifted data message.
Measurements are transmitted with full meter resolution.