PRESSURE_DIFF_MON
Differential-pressure monitor for aisle containment, filters and room pressurisation, with zero trim, band alarms and airflow-reversal latch.
When to use it
Use PRESSURE_DIFF_MON when a differential pressure has to be held inside a band — cold aisle to hot aisle across containment, across a filter bank, or a room against its surroundings — and both the loss of that differential and its reversal have to be annunciated.
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 | — |
| DP_RAW | REAL | Pa |
| SENSOR_OK | BOOL | — |
| DP_ZERO_PA | REAL | Pa |
| LO | REAL | Pa |
| HI | REAL | Pa |
| HYST_PA | REAL | Pa |
| REV_PA | REAL | Pa |
| FILT_T | TIME | — |
| ALM_DLY | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| DP_PA | REAL | Pa |
| OK | BOOL | — |
| CONTAINMENT_OK | BOOL | — |
| DP_LOW | BOOL | — |
| DP_HIGH | BOOL | — |
| ALM_DP_LOW | BOOL | — |
| ALM_DP_HIGH | BOOL | — |
| ALM_REVERSED | BOOL | — |
| ALM_SENSOR_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
| VALID | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 10
- Simulated scans
- 135
- 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 PRESSURE_DIFF_MON — free
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