This meter is used to integrate a storage and records its level, charge and discharge.
For this purpose, the values of a physical meter or the storage itself are read.
Together with other meter function blocks, various consumers, producers or storage units in the building can be linked via the Energy Flow Monitor for an overall display.
Table of Contents
Inputs↑
| Abbreviation | Summary | Description | Value Range |
|---|---|---|---|
| Pf | Power or flow | If only this input is used, the meter reading is also calculated from it. Otherwise it is only used for the output (Pf) and the user interface. |
∞ |
| Mrd | Meter reading Discharge | Discharge Input for meters that send the meter reading directly as an analog value. For meters that only send partial quantities (e.g. Smart Socket), relative metering must be activated in the settings of the block. |
0...∞ |
| Mrc | Meter reading Charge | Charge Input for meters that send the meter reading directly as an analog value. For meters that only send partial quantities (e.g. Smart Socket), relative metering must be activated in the settings of the block. |
0...∞ |
| Slvl | Storage level or state of charge | ∞ | |
| R | Reset | Pulse: Meter reading outputs are reset. On: Block is locked. |
0/1 |
Outputs↑
| Abbreviation | Summary | Description | Value Range |
|---|---|---|---|
| Pf | Power or flow | Positive value: Storage is being discharged. Negative value: Storage is being charged. |
∞ |
| Mrd | Meter Reading discharge | 0...∞ | |
| Rdd | Reading today discharge | 0...∞ | |
| Rldd | Reading yesterday discharge | 0...∞ | |
| Rmd | Reading this month discharge | 0...∞ | |
| Rlmd | Reading last month discharge | 0...∞ | |
| Ryd | Reading this year discharge | 0...∞ | |
| Rlyd | Reading last year discharge | 0...∞ | |
| Mrc | Meter Reading charge | 0...∞ | |
| Rdc | Reading today charge | 0...∞ | |
| Rldc | Reading yesterday charge | 0...∞ | |
| Rmc | Reading this month charge | 0...∞ | |
| Rlmc | Reading last month charge | 0...∞ | |
| Ryc | Reading this year charge | 0...∞ | |
| Rlyc | Reading last year charge | 0...∞ | |
| AC | API Connector | Intelligent API based connector. API Commands |
- |
Parameters↑
| Abbreviation | Summary | Description | Value Range | Default Value |
|---|---|---|---|---|
| Mrod | Meter reading offset discharge | Value is added to output (Mrc). | ∞ | 0 |
| Mroc | Meter reading offset charge | Value is added to output (Mrd). | ∞ | 0 |
Properties↑
| Summary | Description | Value Range | Default Value |
|---|---|---|---|
| Relative metering | Active: The physical meter only sends partial quantities at intervals (relative), the block adds them up and uses them to form the meter reading. Not active: The physical meter provides its own total meter reading (absolute), the function block only maps it. |
- | - |
| Power/Flow direction | Specifies whether the physical meter provides the charge or discharge value as a positive or negative value to the Pf input of the block. | - | - |
| Maximum storage level | Maximum storage level used for the user interface | 0...∞ | 100 |
| Report invalid Meter Reading | When selected, you will be notified if invalid Meter Reading values have been detected. For instance, when a physical counter sends unrealistic values due to transmission errors. | - | - |
Meter reading and units↑
In general, a physical meter records the quantity and transfers the value to the function block at a meter reading input. The function block maps the meter reading and records the statistics for it.
The units for Pf/Mr can be selected independently of each other, as the value at input Pf is only used for output Pf and for display in the user interface.
If the input Pf is used on its own, the block takes over the function of the meter.
In this case, the units for Pf/Mr must be hour-related and must match in magnitude so that the meter reading is calculated correctly.
Examples:
Pf=kW, Mr=kWh
Pf=W, Mr=Wh
Pf=l/h, Mr=l
Pf=m³/h, Mr=m³
Pf=kg/h, Mr=kg
When only the Mr input is connected, power is now calculated based on the meter value. The power is estimated using the difference between the last two meter readings and their time interval. If the same or a smaller meter value is received, power is set to zero. The power output remains unchanged until a new meter value is received.
Detection of Invalid Meter Readings↑
The meter block detects invalid meter readings at the Mr inputs, which can occur due to faulty data transmission from a physical absolute value meter, and ignores them.
In general, only increasing or constant meter readings are allowed; decreasing or jumping to 0 readings are discarded.
Unrealistically high increases in meter readings are discarded if:
-The change in value is greater than the total consumption of the last week.
-Only if the consumption of the last week was greater than todays consumption.
-Only if the time difference since the last value change is less than 8 hours.