BE1_27_59_V
Basler-shaped under / over-voltage element (ANSI 27/59) with definite-time delay, reset hysteresis, dead-bus discrimination and VT-failure blocking.
When to use it
Use BE1_27_59_V when a bus, generator terminal or motor feeder needs under-voltage and over-voltage stages that ride through momentary sags and swells, and must not trip on a blown VT fuse or a bus that is simply de-energised.
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 | — |
| Va | REAL | pu |
| Vb | REAL | pu |
| Vc | REAL | pu |
| V27 | REAL | pu |
| V59 | REAL | pu |
| tD | TIME | — |
| EN27 | BOOL | — |
| EN59 | BOOL | — |
| HYST_PCT | REAL | % |
| V_DEAD | REAL | pu |
| BKR_CLOSED | BOOL | — |
| VT_OK | BOOL | — |
| BLK | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type |
|---|---|
| UV | BOOL |
| OV | BOOL |
| TRIP | BOOL |
| TRIP27 | BOOL |
| TRIP59 | BOOL |
| BUS_DEAD | BOOL |
| DEAD_INH | BOOL |
| BLOCKED | BOOL |
| ALM_VT_FAIL | BOOL |
| ALM_CFG_ERR | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
BE1_27_59_V 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
- 214
- 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 BE1_27_59_V — 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.