POWER_RAIL_SECTION
Traction-power section switch supervision with a proven-dead, proven-open and proven-earthed access permit and back-feed detection.
When to use it
Use POWER_RAIL_SECTION when a third-rail or overhead traction section is switched from the SCADA system, and track access requires the section to be proven de-energised and earthed before anybody is allowed near the conductor.
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 | — |
| SECTION_V | REAL | V |
| ISOLATION_REQ | BOOL | — |
| PERMIT | BOOL | — |
| V_OK | BOOL | — |
| CB_OPEN | BOOL | — |
| CB_CLOSED | BOOL | — |
| EARTH_APPLIED | BOOL | — |
| TRAIN_IN_SECTION | BOOL | — |
| DEAD_V | REAL | V |
| LIVE_V | REAL | V |
| DEAD_CONFIRM | TIME | — |
| SW_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type |
|---|---|
| ENERGIZED | BOOL |
| ISOLATED | BOOL |
| ACCESS_PERMIT | BOOL |
| OPEN_CMD | BOOL |
| CLOSE_CMD | BOOL |
| ALM_BACKFEED | BOOL |
| ALM_SW_FAIL | BOOL |
| ALM_EARTH_ON_LIVE | BOOL |
| ALM_V_FAULT | BOOL |
| ALM_TRAIN_IN_SECTION | BOOL |
| ALM_CFG_ERR | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
POWER_RAIL_SECTION 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
- 10
- Simulated scans
- 198
- 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 POWER_RAIL_SECTION — 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.