CAPACITY_HEADROOM
Power and cooling utilisation against design capacity, with free kW on each and an explicit limiting-resource flag.
When to use it
Use CAPACITY_HEADROOM when a hall, a room or a whole site has a design electrical capacity and a design cooling capacity, and sales or capacity planning has to know how much more load can be placed and which of the two runs out first.
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 |
|---|---|---|
| ENABLE | BOOL | — |
| KW_USED | REAL | kW |
| KW_DESIGN | REAL | kW |
| COOL_USED | REAL | kW |
| COOL_DESIGN | REAL | kW |
| DATA_OK | BOOL | — |
| WARN_PCT | REAL | % |
| CRIT_PCT | REAL | % |
| ALM_DB | REAL | % |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| PWR_PCT | REAL | % |
| COOL_PCT | REAL | % |
| LIMIT | USINT | — |
| PWR_FREE_KW | REAL | kW |
| COOL_FREE_KW | REAL | kW |
| HEADROOM_KW | REAL | kW |
| WORST_PCT | REAL | % |
| VALID | BOOL | — |
| ALM_WARN | BOOL | — |
| ALM_CRIT | BOOL | — |
| ALM_DATA_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 10
- Simulated scans
- 57
- 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 CAPACITY_HEADROOM — 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.