WASH_TEMP_VERIFY
Wash and sanitise verification: temperature at or above minimum, sanitiser inside a BAND rather than over a floor, both held continuously for the contact time, every excursion latched.
When to use it
Use WASH_TEMP_VERIFY when a produce wash, a crate or tray washer, a belt washer or a warewasher is a control measure, and the release of what comes out of it depends on proving temperature AND sanitiser concentration were both present for long enough.
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 | — |
| WASH_T | REAL | degC |
| T_OK | BOOL | — |
| MIN_C | REAL | degC |
| SANITIZER_PPM | REAL | ppm |
| PPM_OK | BOOL | — |
| PPM_MIN | REAL | ppm |
| PPM_MAX | REAL | ppm |
| CONTACT_T | TIME | — |
| DEADBAND_T | REAL | degC |
| DEADBAND_PPM | REAL | ppm |
| WASH_RESET | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| OK | BOOL | — |
| CONDITIONS_OK | BOOL | — |
| CONTACT_MET | BOOL | — |
| VERIFIED_S | REAL | s |
| FAULT_CODE | USINT | — |
| ALM_TEMP_LOW | BOOL | — |
| ALM_PPM_LOW | BOOL | — |
| ALM_PPM_HIGH | BOOL | — |
| ALM_T_FAULT | BOOL | — |
| ALM_PPM_FAULT | BOOL | — |
| ALM_UNMONITORED | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
| VALID | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 12
- Simulated scans
- 414
- 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 WASH_TEMP_VERIFY — 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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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.