DATA_INTEGRITY_MON
Record-integrity monitor: compares a recomputed seal against the sealed value on demand, latches a mismatch, and withdraws intact when the check goes stale.
When to use it
Use DATA_INTEGRITY_MON when a GxP record held or mirrored in the control system — a recipe, a parameter set, a batch header, a calibration table — carries a seal that was computed when it was created, and the control system has to keep proving that the record still matches 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 |
|---|---|
| ENABLE | BOOL |
| CHECK_REQ | BOOL |
| RECORD_HASH | STRING |
| EXPECTED_HASH | STRING |
| RECHECK_TMO | TIME |
| ACK | BOOL |
Outputs
| Port | Type |
|---|---|
| INTACT | BOOL |
| FAULT_CODE | USINT |
| ALM_TAMPER | BOOL |
| ALM_STALE | BOOL |
| CHECKS_OK | UDINT |
| FAIL_COUNT | UDINT |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 10
- Simulated scans
- 123
- 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 DATA_INTEGRITY_MON — 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.