WHEEL_SLIP_SLIDE
Wheel-slip and wheel-slide protection — creep detection, torque trim, re-adhesion ramp and sanding request.
When to use it
Use WHEEL_SLIP_SLIDE when a powered or braked wheelset has its own speed measurement and a vehicle reference speed, and the traction or brake effort on that wheelset must be trimmed back when the rail will not carry it.
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 | — |
| W_SPEED | REAL | m/s |
| V_REF | REAL | m/s |
| SPD_OK | BOOL | — |
| MODE | BOOL | — |
| SLIP_LIM | REAL | % |
| DV_MIN_MS | REAL | m/s |
| V_INHIB_MS | REAL | m/s |
| DUMP_RATE_PCT_S | REAL | %/s |
| RESTORE_RATE_PCT_S | REAL | %/s |
| SAND_MULT | REAL | ratio |
| SAND_DLY | TIME | — |
| SAND_HOLD | TIME | — |
| PERSIST_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| TORQUE_TRIM | REAL | % |
| SLIP_DET | BOOL | — |
| SAND_REQ | BOOL | — |
| SLIP_PCT | REAL | % |
| SLIP_VALID | BOOL | — |
| WSP_ACTIVE | BOOL | — |
| ALM_SPD_FAULT | BOOL | — |
| ALM_WSP_PERSIST | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 146
- 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 WHEEL_SLIP_SLIDE — 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.