OCC_SETBACK_CTRL
Occupancy arbitration and setback with standby, after-hours override and a computed optimum-start lead.
When to use it
Use OCC_SETBACK_CTRL when a zone's setpoint has to be arbitrated between a time schedule, a presence sensor and an after-hours override, and the plant should start early enough to reach comfort by the start of occupancy rather than at 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 | — |
| SCHED_OCC | BOOL | — |
| OCC_SENSOR | BOOL | — |
| SENSOR_OK | BOOL | — |
| OCC_SP | REAL | degC |
| UNOCC_SP | REAL | degC |
| STANDBY_OFFSET_K | REAL | K |
| COOLING_SENSE | BOOL | — |
| ZONE_TEMP | REAL | degC |
| ZONE_OK | BOOL | — |
| TIME_TO_OCC | REAL | min |
| RECOVERY_RATE | REAL | K/h |
| MAX_START_MIN | REAL | min |
| OVERRIDE_TMO | TIME | — |
| STANDBY_TMO | TIME | — |
| RECOVERY_DB_K | REAL | K |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| EFFECTIVE_SP | REAL | degC |
| OCC_MODE | USINT | — |
| OCC_EFF | BOOL | — |
| START_LEAD_MIN | REAL | min |
| LEAD_VALID | BOOL | — |
| ALM_LONG_RECOVERY | BOOL | — |
| ALM_SENSOR | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 9
- Simulated scans
- 137
- 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
Download OCC_SETBACK_CTRL — free
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