ISOLATOR_LEAK_TEST
Isolator and RABS pressure-decay leak test with temperature compensation and result validity.
When to use it
Use ISOLATOR_LEAK_TEST when a sealed isolator, RABS or transfer chamber has to be leak-tested by pressure decay before a campaign, and the hourly leak rate has to be recorded against an acceptance limit.
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 | — |
| START | BOOL | — |
| ABORT | BOOL | — |
| P_PV | REAL | Pa |
| P_OK | BOOL | — |
| P_ATM | REAL | Pa |
| P_SP | REAL | Pa |
| FILL_TMO | TIME | — |
| STAB_T | TIME | — |
| T | TIME | — |
| DECAY_LIM | REAL | Pa/h |
| TEMP_C | REAL | degC |
| TEMP_OK | BOOL | — |
| TEMP_COMP | BOOL | — |
| DRIFT_LIM | REAL | K |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| DECAY | REAL | Pa/h |
| PASS | BOOL | — |
| PHASE | USINT | — |
| TEST_ACTIVE | BOOL | — |
| FILL_CMD | BOOL | — |
| RESULT_VALID | BOOL | — |
| P_START | REAL | Pa |
| P_END | REAL | Pa |
| T_DRIFT | REAL | K |
| ALM_FAIL | BOOL | — |
| ALM_RESULT_INVALID | BOOL | — |
| ALM_TMO | BOOL | — |
| ALM_TEMP_DRIFT | BOOL | — |
| ALM_P_FAULT | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
ISOLATOR_LEAK_TEST 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
- 689
- 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 ISOLATOR_LEAK_TEST — 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.