CCP_MONITOR
HACCP critical-control-point monitor with an operating limit ahead of the critical limit, a latched deviation and cumulative time out of control.
When to use it
Use CCP_MONITOR when a measured parameter is the monitoring procedure for a critical control point — pasteuriser hold temperature, oven exit temperature, fryer time-temperature, chill-tunnel exit, acidified-food pH, metal-detector reject-window pressure — and product may only pass while the parameter is proven inside its critical limit.
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 | — |
| PV | REAL | PV units |
| PV_OK | BOOL | — |
| CRIT_LIM | REAL | PV units |
| OP_LIM | REAL | PV units |
| DIRECTION | BOOL | — |
| DEADBAND | REAL | PV units |
| DEV_DELAY | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| IN_CONTROL | BOOL | — |
| MARGIN | REAL | PV units |
| VALID | BOOL | — |
| OUT_OF_LIMIT | BOOL | — |
| WARN_OP_LIM | BOOL | — |
| ALM_DEVIATION | BOOL | — |
| ALM_PV_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
| DEV_COUNT | UDINT | — |
| DEV_SECONDS | REAL | s |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 13
- Simulated scans
- 381
- 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 CCP_MONITOR — 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.