DCW_MAKEUP_CTRL
Cooling-tower basin makeup control with metered totalising and fill-timeout supervision.
When to use it
Use DCW_MAKEUP_CTRL when a cooling-tower basin (or evaporative-cooling sump) is filled from a makeup line on level, and the makeup volume has to be totalised for cycles-of-concentration or WUE reporting.
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 | — |
| LEVEL_PCT | REAL | % |
| LVL_OK | BOOL | — |
| START_PCT | REAL | % |
| STOP_PCT | REAL | % |
| LOW_LOW_PCT | REAL | % |
| HIGH_HIGH_PCT | REAL | % |
| MAKEUP_FLOW | REAL | m3/h |
| FILL_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| MAKEUP_CMD | BOOL | — |
| FILLING | BOOL | — |
| MAKEUP_TOTAL_M3 | REAL | m3 |
| ALM_LOW_LOW | BOOL | — |
| ALM_HIGH_HIGH | BOOL | — |
| ALM_FILL_TMO | BOOL | — |
| ALM_LVL_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
DCW_MAKEUP_CTRL 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
- 7
- Simulated scans
- 155
- 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 DCW_MAKEUP_CTRL — 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.