Configure the following parameters:Channel Type. A monitoring data program channel can either be an interval channel or a register channel.
Interval Channel
An interval channel stores a data quantity recorded by a metering device for a set frequency. For example, with a 15-minute interval, register values are recorded every 15 minutes. The time between readings is both predictable and exact. The interval length, also called the interval frequency, is the number of minutes that elapse between recording register values. Interval lengths divide evenly into 60, with the exception of the 1440-minute interval that represents 24 hours.
Register Channel
A register channel records a single value quantity. A single value quantity is one that is not recorded on a precise timer interval or frequency; the time between readings is irregularly-spaced and not predictable. Register quantities usually represent total or summary values over a much longer time period than interval values.
Meter Channel #
Defines the meter channel.
The meter channel number is required and must be unique for each monitoring data program channel.
UOM
Defines the reading unit of measure (UOM). UOM is required for channel configuration of both a data routing program and a monitoring data program.
When configuring a monitoring data program, the UOM must be unique for all channels with the same data type.
For a monitoring data channel, which is routed to an external system, UOM is required to link the routing program channel to the monitoring program channel. It is also required so that external systems can understand the measurement quantity associated with the service point channel. This is required to support the import addressing mode.
Multiplier
Determines the factor that is used to normalize the data. This field displays Pulse Multiplier for interval channels and Meter Multiplier for register channels.
- Pulse Multiplier. The factor used to convert pulses of energy to kilowatt usage per hour (KWh). Interval data is normalized by applying the pulse multiplier to the interval data.
- Meter Multiplier. The factor that is applied to the meter reading to show the actual usage.
In some cases, external multipliers may also be applied. For more information, see Convert to Primary Units.
Number of Dials
Defines the number of dials that are used for the meter read. Typically, the number of dials is used to determine roll-over values.
This field is enabled for register channels only.
Convert to Primary Units
Determines if the data is multiplied by the appropriate external multiplier: Current Transformer (CT) and Potential Transformer (PT) ratio values. Interval data is normalized by applying the pulse multiplier to the interval data. For the register channel, only demand data is normalized by applying the meter multiplier to the demand data.
If you select Convert to Primary Units, IDM multiplies the data by the PT, CT or both values as defined in the effective meter entity configuration:
- Data with a voltage related UOM has the PT applied.
- Data with a current (Amps) related UOM has the CT ratio applied.
- For all energy values, both PT and CT ratio values are applied.