AUDIT_TRAIL_FB
Audit-entry capture: sequences, seals and chains one old/new/reason entry and holds it until the record layer confirms it is stored.
When to use it
Use AUDIT_TRAIL_FB when changes made inside the controller — set-point edits, mode changes, manual overrides, alarm-limit edits — have to reach an audit trail with their old value, new value and reason, and the control system must be able to prove that no entry was silently lost on the way.
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 |
| LOG_REQ | BOOL |
| EVENT | STRING |
| OLD_VAL | STRING |
| NEW_VAL | STRING |
| REASON | STRING |
| TIME_TRUSTED | BOOL |
| STORE_OK | BOOL |
| ACK | BOOL |
Outputs
| Port | Type | Unit |
|---|---|---|
| ENTRY_HASH | STRING | — |
| ENTRY_SEQ | UDINT | — |
| ENTRY_EVENT | STRING | — |
| ENTRY_OLD | STRING | — |
| ENTRY_NEW | STRING | — |
| ENTRY_REASON | STRING | — |
| PENDING | BOOL | — |
| STORED | BOOL | — |
| REASON_MISSING | BOOL | — |
| TIME_SUSPECT | BOOL | — |
| REJECT_CODE | USINT | — |
| ALM_ENTRY_LOST | BOOL | — |
| LOST_COUNT | UDINT | — |
| PEND_AGE_S | REAL | s |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 114
- 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 AUDIT_TRAIL_FB — 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.