Command mode overview

Chapter 11—Multi-tariff feature	PowerLogic™ PM5500 series user manual

You can use this mode to send a Modbus command to the device which sets the active tariff. This tariff is applied to the measured energy until you send another Modbus command that sets a different tariff.

Time of day mode overview

You can use this mode to create a tariff schedule that specifies where the meter stores energy or input metered data, based on the time of year (month, day), the type of day (every day, weekend, weekday or a specific day of the week), or time of day. The data collected from the different tariffs can then be used in energy audits or similar costing and budget planning purposes.

Tariff validity

A valid tariff has certain conditions and limitations:

•Each tariff must cover a unique time period (tariffs cannot overlap) but there can be periods with no tariff.

•Any number of tariffs, from none to the maximum number of tariffs, can be applied.

•Time of day tariffs do not adjust for daylight savings time.

•Time of day tariffs include February 29th in leap years (however, it is not recommended to have February 29th as a start or end date, as that tariff would be invalid for non-leap years.

•Except for leap years, tariff dates are not year-specific; if you wanted to create a tariff that starts on the first Monday in August, you need to enter the date for that year, then manually update the tariff information for the subsequent years.

•DST (daylight savings time) is not supported by the meter.

Tariff creation method

Your device performs validation checks as you enter tariff information; it prompts you to change the information that you have entered or set the tariff to disabled if the tariff configuration is invalid. These checks can include:

•Start and end times must be different (for example, you cannot create a tariff that starts at 02:00 and also ends at 02:00).

•Start time can only be earlier than end time for tariffs that are applied every day. You can create a daily tariff that starts at 06:00 and ends at 02:00, but these times are only valid for the Everyday tariff and invalid for the other tariff types.

•Start day must be earlier than end day if the days are in the same month. You cannot create a tariff that starts June 15 and ends June 12.

There are two methods of creating tariffs:

•Time of year tariffs divide the year into multiple sections (usually seasons), where each section has one or more day types. For example, an eight tariff configuration using this method could have Spring, Summer, Fall and Winter seasons that also use different weekend and weekday tariffs.

•Daily tariffs can divide days by day of the week, a weekday, a weekend, or every day, and can specify the time of day. For example, an eight tariff configuration could have every day in the year divided into three-hour tariff periods or could have four tariffs for weekends and four tariffs for weekdays.

104	HRB1684301-01

Schneider Electric HRB1684301-01 user manual Command mode overview, Time of day mode overview

Models: HRB1684301-01