FB_MllPrediction
Syntax
Definition:
FUNCTION_BLOCK FB_MllPrediction
VAR_INPUT
stPredictionParameter : ST_MllPredictionParameters;
eTraceLevel : TcEventSeverity;
END_VAR
VAR_OUTPUT
bBusy : BOOL;
bError : BOOL;
ipResultMessage : I_TcMessage;
hrErrorCode : HRESULT;
END_VAR
Inputs
|
Name |
Type |
Description |
|---|---|---|
|
stPredictionParameter |
General Prediction parameters | |
|
eTraceLevel |
TcEventSeverity |
Eventlogger trace level. Default = Critical. Must be set before Configure method is called |
Outputs
|
Name |
Type |
Description |
|---|---|---|
|
bBusy |
BOOL |
True if a asynchronous action is taking place |
|
bError |
BOOL |
Indicates error in method |
|
ipResultMessage |
I_TcMessage |
Contains the last invoked error |
|
hrErrorCode |
HRESULT |
Unique error code |
Methods
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General information
The FB_MllPrediction is a central Function Block for the usage of TC3 Machine Learning in the PLC. The Function Block offers a variety of Methods as described above. Basically, the FB_MllPrediction offers the functionality to load and to execute ML models. Hence, it is an interface to the TwinCAT 3 integrated inference engine (ML Runtime).
Error handling
Note that all methods of FB_MllPrediction return a BOOL which indicates if the execution on the method caused any error, e.g.
bFailed := fbprediction.GetInputDim(nInputDim);
The evaluation of the return value of the methods is equivalent to the evaluation of the Output bError of FB_MllPrediction.
Further, FB_MllPrediction references the TwinCAT 3 EventLogger and thus ensures that information (events) is provided via the standardized interface I_TcMessage. The trace level can be adjusted using TcEventSeverity.
Sample Code
Sample code for the usage of the Function Block is available here.