PROT_78_VSHIFT
ANSI 78 vector shift for loss-of-mains: a drift-compensated, wrap-safe measurement of the step in the voltage vector angle.
When to use it
Use PROT_78_VSHIFT when a legacy embedded-generation loss-of-mains scheme specifies vector shift (phase-displacement) rather than, or in addition to, ROCOF — typically an existing G59 installation whose settings must be preserved.
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 | — |
| ANG | REAL | deg |
| ANG_OK | BOOL | — |
| SHIFT_DEG | REAL | deg |
| WIN_S | REAL | s |
| TRACK_S | REAL | s |
| V_PCT | REAL | % |
| V_BLOCK_PCT | REAL | % |
| BLK | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| PICKUP | BOOL | — |
| TRIP | BOOL | — |
| SHIFT_MEAS | REAL | deg |
| VALID | BOOL | — |
| BLOCKED | BOOL | — |
| V_BLOCKED | BOOL | — |
| ALM_MEAS_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
PROT_78_VSHIFT 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
- 11
- Simulated scans
- 492
- 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 PROT_78_VSHIFT — free
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