RACK_KW_MON
Dual-feed rack power monitor with per-feed continuous-load limits, A/B redundancy loss detection, dead-feed latching and energy totalising.
When to use it
Use RACK_KW_MON when a rack is fed from two independent A and B supplies through metered rack PDUs, and the site needs the rack's power and energy for capacity and PUE reporting AND needs to know before a single feed failure can trip the survivor.
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_A_RAW | REAL | kW |
| KW_B_RAW | REAL | kW |
| A_OK | BOOL | — |
| B_OK | BOOL | — |
| DUAL_FEED | BOOL | — |
| FEED_A_PRESENT | BOOL | — |
| FEED_B_PRESENT | BOOL | — |
| FEED_KW_MAX | REAL | kW |
| LOAD_PCT_MAX | REAL | % |
| RACK_KW_MAX | REAL | kW |
| FEED_LOST_KW | REAL | kW |
| DB_PCT | REAL | % |
| ALM_DLY | TIME | — |
| RANGE_HI | REAL | kW |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| KW_A | REAL | kW |
| KW_B | REAL | kW |
| KW_TOTAL | REAL | kW |
| KWH_TOTAL | REAL | kWh |
| LOAD_PCT | REAL | % |
| USABLE_KW | REAL | kW |
| VALID | BOOL | — |
| ALM_FEED_A_HI | BOOL | — |
| ALM_FEED_B_HI | BOOL | — |
| ALM_RACK_HI | BOOL | — |
| ALM_NO_REDUND | BOOL | — |
| ALM_FEED_LOST | BOOL | — |
| ALM_METER_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Supervised control write
RACK_KW_MON commands a real actuator. It is written to sit underneath your own interlock, permissive and protection logic — not to replace it. Commission it as you would any control block you wrote yourself.
Validation evidence
- Tests
- 11
- Simulated scans
- 255
- 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
Download RACK_KW_MON — 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 and the datasheet.
Every block in the catalogue is free to download, in every format it ships, with no purchase and no card. Browsing needs no account at all; downloading needs a signed-in one, so the block lands in your library and re-downloads whenever you need it.
Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.