SANDING_CTRL
Adhesion sanding control — speed-scaled dose rate, low-speed inhibit, duty limiting, hopper supervision and an emergency override.
When to use it
Use SANDING_CTRL when a vehicle carries sanders that must be fired on wheel slip, wheel slide or a driver's request, and the sand delivered per metre of rail has to be controlled rather than simply switched on.
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 | — |
| SLIP_DET | BOOL | — |
| SLIDE_DET | BOOL | — |
| MAN_REQ | BOOL | — |
| EMERG_REQ | BOOL | — |
| V_TRAIN | REAL | m/s |
| SPD_OK | BOOL | — |
| INHIBIT | BOOL | — |
| SAND_LOW | BOOL | — |
| SAND_EMPTY | BOOL | — |
| MAX_RATE | REAL | g/s |
| DOSE_G_M | REAL | g/m |
| V_MIN_MS | REAL | m/s |
| MIN_ON | TIME | — |
| MAX_ON | TIME | — |
| REST | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| SAND_VALVE | BOOL | — |
| RATE | REAL | g/s |
| TOTAL_KG | REAL | kg |
| INHIBITED | BOOL | — |
| DUTY_BLOCKED | BOOL | — |
| RATE_VALID | BOOL | — |
| ALM_HOPPER_EMPTY | BOOL | — |
| ALM_SAND_LOW | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 9
- Simulated scans
- 184
- 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 SANDING_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.