SE_27_59_V
Easergy / MiCOM shaped under- and over-voltage elements (ANSI 27/59) with independent stage timers, a percentage reset hysteresis and a pole-dead inhibit.
When to use it
Use SE_27_59_V when a busbar, feeder or generator connection point needs voltage supervision modelled in the PLC — for load shedding, loss-of-mains detection, automatic transfer initiation, or generator terminal protection.
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 | — |
| HYST_PCT | REAL | % |
| V_DEAD | REAL | pu |
| IMAX | REAL | x In |
| I_DEAD | REAL | x In |
| UV_EN | BOOL | — |
| OV_EN | BOOL | — |
| MEAS_OK | BOOL | — |
| BLK | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| UV | BOOL | — |
| OV | BOOL | — |
| TRIP | BOOL | — |
| VMIN | REAL | pu |
| VMAX | REAL | pu |
| START_27 | BOOL | — |
| START_59 | BOOL | — |
| DEAD_BUS | BOOL | — |
| FIRST_OUT | INT | — |
| BLOCKED | BOOL | — |
| VALID | BOOL | — |
| ALM_MEAS_FAULT | BOOL | — |
| ALM_INHIBITED | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
SE_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
- 12
- Simulated scans
- 209
- 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 SE_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.
Every block in the catalogue is free to download, in every format, with no purchase and no card. Browsing needs no account at all; downloading needs a signed-in one, so the block lands in your library and re-downloads whenever you need it.
Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.