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Offset parameter is set to 300 (5 minutes), the recording will take place at 5 minutes after the hour
every hour, i.e. 00:05, 01:05, 02:05…etc. The value of the Recording Offset parameter should be less
than the Recording Interval parameter.
4.5 Time of Use (TOU)
Time-Of-Use (TOU) is used for electricity pricing that varies depending on the time of day, day of week,
and the season. The TOU system allows the user to configure an electricity price schedule inside the
PMC-340 and accumulate energy consumption into different TOU rates based on the time of
consumption. TOU programming is only supported through communications.
The TOU feature on PMC-340 supports two TOU schedules, which can be switched at a pre-defined
time. Each TOU schedule supporting:
Up to 12 seasons
90 Holidays or Alternate Days and 3 Weekdays
20 Daily Profiles, each with 12 Periods in 15-minute interval
4 Tariffs
Instead of using the TOU schedule to switch between Tariffs, the PMC-340 supports Tariff switching
based on the status of DI1 to DI2, which is supported in Firmware V1.00.01 or later.
The 2 Digital Inputs (DI1 and DI2) represent 2 binary digits where Tariff 1=00, Tariff 2=01, Tariff 3= 10,
and Tariff 4=11 where D1 represents the least significant digit and D2 represents the most significant
digit. As soon as DI1 and/or DI2 are configured as Tariff Switches, the current TOU Tariff will be
determined by the status of the DIs, and the TOU Schedule will be ignored. The DI1 Function setup
register must first be programmed as a Tariff Switch before configuring DI2 with the same function.
In other words, if DI1 is configured as a Digital Input or Energy Pulse Counter and DI2 is configured as
a Tariff Switch, the TOU will continue to function based on the TOU Schedule. The number of Tariffs
supported depends on how many DIs are programmed as a Tariff Switch as indicated in the following
table.
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