DCW_PUMP_DUTY_STBY
Duty/standby pump pair with alternation, start-feedback supervision, automatic changeover and run-hour accounting.
When to use it
Use DCW_PUMP_DUTY_STBY when two interchangeable pumps serve one duty — makeup transfer, condensate transfer, filter feed, chemical loop circulation — and the standby must pick up automatically when the duty pump fails to prove running.
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 |
|---|---|
| ENABLE | BOOL |
| RUN_REQ | BOOL |
| P1_AVAIL | BOOL |
| P2_AVAIL | BOOL |
| P1_RUN | BOOL |
| P2_RUN | BOOL |
| FB_TMO | TIME |
| ALTERNATE | BOOL |
| ACK | BOOL |
Outputs
| Port | Type | Unit |
|---|---|---|
| P1_CMD | BOOL | — |
| P2_CMD | BOOL | — |
| DUTY_P2 | BOOL | — |
| RUNNING | BOOL | — |
| ALM_P1_FAIL | BOOL | — |
| ALM_P2_FAIL | BOOL | — |
| ALM_NONE_AVAIL | BOOL | — |
| P1_HOURS | REAL | h |
| P2_HOURS | REAL | h |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
DCW_PUMP_DUTY_STBY 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
- 242
- 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_PUMP_DUTY_STBY — free
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