DIGESTER_TEMP_CTRL
Anaerobic digester temperature control on a sludge recirculation heat-exchanger loop, with recirculation proof, overtemperature trip and deviation supervision.
When to use it
Use DIGESTER_TEMP_CTRL when an anaerobic digester is heated by pumping sludge through an external heat exchanger fed from a hot-water circuit, and the exchanger's water-side valve is modulated to hold the digester at its mesophilic or thermophilic setpoint.
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 | — |
| TEMP | REAL | °C |
| TEMP_OK | BOOL | — |
| SP | REAL | °C |
| RECIRC_RUN | BOOL | — |
| RECIRC_MIN | REAL | % |
| KP | REAL | %/°C |
| TI_S | REAL | s |
| HX_MAX_PCT | REAL | % |
| DEV_C | REAL | °C |
| DEV_TMO | TIME | — |
| HI_TRIP_C | REAL | °C |
| RECIRC_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| HX_VALVE_PCT | REAL | % |
| RECIRC_PCT | REAL | % |
| HEATING | BOOL | — |
| IN_BAND | BOOL | — |
| ERR_C | REAL | °C |
| ALM_TEMP_DEV | BOOL | — |
| ALM_OVERTEMP | BOOL | — |
| ALM_NO_RECIRC | BOOL | — |
| ALM_TEMP_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 8
- Simulated scans
- 227
- 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 DIGESTER_TEMP_CTRL — free
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