Operation: C12.19 C1SD, C1ST, and C1SL Versions
CENTRON® Meter Technical Reference Guide 55
Calendar Schedule
The calendar schedule contains all daily and yearly information needed for the meter to
measure and register data in real time. The TOU calendar is programmable for up to 25
years and accommodates leap year, daylight savings time, and recurring holidays. The
schedule contains daily patterns, seasons, and holidays with programmable day types, rates
and outputs. For information concerning the entry of these parameters into the PC-PRO+
Advanced software package, consult the PC-PRO+ Advanced System Manual. This manual
is installed with the PC-PRO+ Advanced software and is accessible through the Windows
Start menu.
Rate Schedules
Four independent rates are available for TOU registration. These are designated A, B, C,
and D. Only one of these rates can be active at a time. The Total register, designated Rate
t, is always active, regardless of the active rate period.
The CENTRON meter TOU rates are applied to all energy and demand registers that have
been selected for measurement. Therefore, all energy and demand registers are segmented
as per the TOU schedule and available in each rate period, in addition to the Total rate.
Daily Patterns
Each pattern defines the times during the day that rate period A, B, C, or D begins and ends.
Up to 24 rate period changes (also called switchpoints) may be specified for each daily
pattern.
Day Types
There are four day types: Weekday, Saturday, Sunday, and Holiday. Each day of the week
is assigned to one of the four day types. Each day type is assigned one of the four daily
patterns when each season is defined. Any of the daily patterns can be used in any
combination with the day types. The CENTRON meter TOU implementation supports up to
44 holidays per year; it also supports leap years.
Seasonal Schedules
A season is a period of weeks during the year when a particular rate structure is in effect.
The year can be divided into a maximum of eight seasons. The day types with associated
daily patterns can be defined differently for each season. Up to eight season change dates
are specified for each year in the calendar schedule. If multiple seasons are not used, the
TOU schedule contains one year-round season.
Season changes occur at midnight of the season change date (where midnight corresponds to
00:00 hours) or can be designated through programming to occur at the first demand reset
following the season change date.
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