BLDG_SUBMETER
Building electrical sub-metering: scan-rate-independent energy totalising, interval demand, reactive power and power factor.
When to use it
Use BLDG_SUBMETER when a metering point's real and apparent power are available as analogue values and the site needs a scan-rate-independent kWh total, the utility's interval demand figure, and power factor for a tariff or a tenant allocation.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| PARAMS | STRING | — |
| ENABLE | BOOL | — |
| KW | REAL | kW |
| KVA | REAL | kVA |
| METER_OK | BOOL | — |
| DEMAND_WINDOW | TIME | — |
| PF_ALM | REAL | fraction |
| RESET_TOTALS | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| KWH | REAL | kWh |
| KW_DEMAND | REAL | kW |
| KVAR | REAL | kvar |
| PF | REAL | fraction |
| KW_PEAK | REAL | kW |
| GAP_S | REAL | s |
| DEMAND_VALID | BOOL | — |
| PF_VALID | BOOL | — |
| ALM_METER_FAULT | BOOL | — |
| ALM_LOW_PF | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 1069
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
- Conforms to IEC 61499
Download BLDG_SUBMETER — free
Create a free Ri Tech account to download the block. You get the Structured Text body, the Rockwell Add-On Instruction (.L5X), the Schneider Control Expert DFB (.XDB), PLCopen XML, the IEC 61499 function block type (.fbt) and the datasheet.
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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.