PSD_CTRL
Platform screen door control: opens only on a proven berthed and aligned train, re-opens on obstruction, and proves locked before departure.
When to use it
Use PSD_CTRL when a platform is fitted with platform screen doors or platform edge doors that must open in step with the train doors, and the departure interlock needs a proven 'all platform doors locked' contribution from the control system.
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 |
| TRAIN_BERTHED | BOOL |
| DOORS_ALIGNED | BOOL |
| TRAIN_DOORS_OPEN | BOOL |
| BERTH_DET_OK | BOOL |
| PSD_SHUT | BOOL |
| OBSTRUCTED | BOOL |
| TRAVEL_TMO | TIME |
| REOPEN_HOLD | TIME |
| RETRY_LIMIT | INT |
| UNCMD_TMO | TIME |
| ACK | BOOL |
Outputs
| Port | Type |
|---|---|
| PSD_OPEN | BOOL |
| CLOSE_CMD | BOOL |
| LOCKED | BOOL |
| OPEN_PERMIT | BOOL |
| DEPART_PERMIT | BOOL |
| RETRIES | INT |
| ALM_OBSTRUCT | BOOL |
| ALM_CLOSE_FAIL | BOOL |
| ALM_UNCMD_OPEN | BOOL |
| ALM_BERTH_FAULT | BOOL |
| ALM_CFG_ERR | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
PSD_CTRL 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
- 272
- 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 PSD_CTRL — 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.