PUMP_DRY_RUN_PROT
Dry-run and loss-of-prime trip on the underpower-plus-no-flow signature, with start blanking, a blocked-discharge cause and a published protection-availability flag.
When to use it
Use PUMP_DRY_RUN_PROT when a pump can be run with nothing to pump — a wet well drawn below the intake, a suction valve left shut, a lost prime on a dry-pit pump — and the damage happens in minutes.
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 | — |
| RUNNING | BOOL | — |
| KW | REAL | kW |
| KW_OK | BOOL | — |
| KW_MIN | REAL | kW |
| FLOW | REAL | m3/h |
| FLOW_OK | BOOL | — |
| FLOW_MIN | REAL | m3/h |
| DELAY | TIME | — |
| START_BLANK | TIME | — |
| INST_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type |
|---|---|
| TRIP | BOOL |
| CAUSE | USINT |
| DRY_NOW | BOOL |
| NO_FLOW_NOW | BOOL |
| ARMED | BOOL |
| PROT_AVAIL | BOOL |
| ALM_INST_FAULT | BOOL |
Supervised control write
PUMP_DRY_RUN_PROT 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
- 8
- Simulated scans
- 247
- 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 PUMP_DRY_RUN_PROT — free
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