TRACTION_EFFORT_CTRL
Tractive and braking effort control from a driver or ATO demand — speed envelope, adhesion clamp and jerk limit.
When to use it
Use TRACTION_EFFORT_CTRL when a driver's controller or an ATO effort demand has to be turned into a motor torque setpoint for a traction converter, bounded by the tractive-effort-vs-speed envelope and by the adhesion the rail will carry.
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 | — |
| PERMIT | BOOL | — |
| BRAKE_PERMIT | BOOL | — |
| DEMAND_PCT | REAL | % |
| V_TRAIN | REAL | m/s |
| SPD_OK | BOOL | — |
| BRAKE_MODE | BOOL | — |
| ADHESION_LIM | REAL | kN |
| F_MAX_KN | REAL | kN |
| P_MAX_KW | REAL | kW |
| FB_MAX_KN | REAL | kN |
| PB_MAX_KW | REAL | kW |
| JERK_KN_S | REAL | kN/s |
| AT_LIM_HYST_PCT | REAL | % |
| R_WHEEL_M | REAL | m |
| GEAR_RATIO | REAL | ratio |
| N_MOTORS | INT | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| EFFORT_KN | REAL | kN |
| TORQUE_SP | REAL | N.m |
| AT_LIMIT | BOOL | — |
| EFF_MAX_KN | REAL | kN |
| TORQUE_VALID | BOOL | — |
| ALM_SPD_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 274
- 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 TRACTION_EFFORT_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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