Apportioned Electricity Billing Function - Mitsubishi Electric AE-200A Instruction Book

5-5. Apportioned electricity billing function

The AE-200/AE-50/EW-50 apportioned electricity billing function calculates the "electric energy for the
electricity meter" and the "apportioned electric energy for the electricity meter per group/interlocked unit" or the
"apportionment parameters for apportioning the electric energy per group/interlocked unit," and stores this in the
accumulator. Additionally, the accumulator is stored in "Log_Buffer" of the trend log.
The cumulative value and trend log data can be read by BACnet
®
BACnet communications cannot read billing information.
When using the apportioned electricity billing function, a "Charge" license is required for each
AE-200/AE-50/EW-50. Refer to the AE-200/AE-50/EW-50 Instruction Book (Apportioned Electricity Billing
Function) for details on the apportioned electricity billing function.
When using the apportioned electricity billing function, refer to (3) "When using an apportioned electricity billing
function" in section 3-1 "Sample system configurations" for system configuration.
5-5-1. Apportioned electricity billing function specifications
The apportioned electricity billing function in the BACnet
stores the electric energy and other cumulative value/apportioned results cumulative value and the trend log
object which reads the accumulator for each fixed time and accumulates the value. When using the apportioned
electricity billing function, a "Charge" license is required.
Note
An interlocked unit is an OA Processing Unit (FU attribute) linked to an indoor unit, and covers those
affiliated OA Processing Units that can be registered in the energy management block settings of the Initial
Setting Tool.
This does not refer to an OA Processing Unit (IC attribute) that is not linked to an indoor unit that can have
group settings performed through the centralized controller.
Electric energy in
electricity meter
Operating state of air
conditioning unit
Accumulator specifications
Data type
Electric energy *1 *4
Apportionment
parameter *2 *4 *6
*1 Electricity meter must be connected to obtain the electric energy. Also, apportionment calculation is carried out using AE-200 for
dedicated electricity apportionment.
*2 The electricity meter need not be connected to obtain the apportionment parameters. Select when carrying out apportionment
calculations in a building management system.
*3 Cumulative data for 30 minute cycles. (Data for until XX:00 and XX:30 minutes is updated at XX:15 and XX:45 respectively)
*4 The value can be compensated by writing the value in the "Value_Set" of the accumulator object.
*5 Stores apportionment results by the apportionment method set in the billing function settings for the apportioned electricity billing function.
*6 The apportionment parameter is a value that is proportionate to the electric energy consumption calculated based on the operation status
and operation time of each air conditioning unit, and will be the reference value for separately-calculating the electric energy (or electricity
charge) using the ratio of this value and the total value of apportionment parameters for all units.
WT07919X04
Apportioned
calculation
Accumulator object
• PIcontroller Electric Energy
• Pulse Input Electric Energy
• Group Apportioned Electric
Energy
• Interlocked Units Apportioned
Electric Energy
• Group Apportionment parameter
• Interlocked Units Apportionment
parameter
Apportioning type
Cumulative electric energy from electricity meter read from PI controller
Apportionment
Cumulative electric energy from electricity meter read from built-in Pulse
source
Input (PI) of AE-50/EW-50
Electric energy for each group (indoor unit + outdoor unit)
Apportioned results
Electric energy for each interlocked unit (indoor unit + outdoor unit)
Apportionment parameters for each group (for outdoor units)
Apportionment
parameter
Apportionment parameters for each interlocked unit (for outdoor units)
®
communication.
®
function is configured of an accumulator object which
Accumulation
• Trend Log PIcontroller Electric Energy
• Trend Log Pulse Input Electric Energy
• Trend Log Group Apportioned Electric Energy
• Trend Log Interlocked Units Apportioned Electric
Energy
• Trend Log Group Apportionment parameter
• Trend Log Interlocked Units Apportionment
parameter
Contents
26
Trend Log object
*3
*5
*5
*5
*5