TRACTION_CUTOUT
Non-vital traction permissive — doors, brake and vigilance, with a latched cut-out for a permissive lost in motion and recovery only at standstill.
When to use it
Use TRACTION_CUTOUT when a supervisory controller has to decide whether traction may be commanded, and a permissive lost while the train is moving must not be allowed to restore itself when the condition clears.
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 |
| DOORS_CLOSED | BOOL |
| BRAKE_RELEASED | BOOL |
| DEADMAN_OK | BOOL |
| ZERO_SPEED | BOOL |
| ZS_OK | BOOL |
| RESET | BOOL |
| CONFIRM | TIME |
Outputs
| Port | Type |
|---|---|
| TRACTION_PERMIT | BOOL |
| CUTOUT_LATCHED | BOOL |
| CAUSE | USINT |
| ALM_DOOR_IN_MOTION | BOOL |
| ALM_VIGILANCE_TRIP | BOOL |
| RESET_INHIBIT | BOOL |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
TRACTION_CUTOUT 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
- 109
- 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_CUTOUT — free
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