LEAK_DETECT
Six-zone leak-rope and spot water detection with a debounce, a latched trip that isolates the served unit, and a cable fault that deliberately does not trip.
When to use it
Use LEAK_DETECT when leak-detection rope or spot sensors cover the wet plant under a data hall — CRAH drip trays, pipework, valve stations, humidifier drains — and a confirmed leak must take the served unit off the water and stay latched until an operator clears it.
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 |
|---|---|
| Z1_WET | BOOL |
| Z2_WET | BOOL |
| Z3_WET | BOOL |
| Z4_WET | BOOL |
| Z5_WET | BOOL |
| Z6_WET | BOOL |
| ZONES | USINT |
| CABLE_OK | BOOL |
| DEBOUNCE | TIME |
| INHIBIT | BOOL |
| ACK | BOOL |
Outputs
| Port | Type |
|---|---|
| ZONE | USINT |
| WET | BOOL |
| TRIP | BOOL |
| ANY_WET | BOOL |
| ALM_CABLE_FAULT | BOOL |
| ALM_INHIBITED | BOOL |
| ALM_CFG_ERR | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
LEAK_DETECT 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
- 142
- 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 LEAK_DETECT — 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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