FB_BA_LoopSync
The function block is used for parameter synchronization for 2 controllers of type FB_BA_Loop. This function block can be used, for example, to calibrate master controllers that are used to generate the supply air setpoints for an air conditioning system.
The following parameters of the FB_BA_Loop are synchronized:
- eOpMode
- eActionRm
- fProportionalConstant
- fIntegralConstant
- fDerivativeConstant
- fMaxOutputRm
- fMinOutputRm
- nDampConstant
- fNeutralZone
Error detection
The error messages listed below are detected by the FB_BA_LoopSync.
The error messages are output in the TwinCAT 3 development environment in the "Error list" window. This can be activated under the menu item View.
The error texts are output via the property ErrText and the output sErrText.
In addition, the messages are displayed by the enum eErrState.
Error messages
Message text German | Message text English | Explanation |
|---|---|---|
'Synchronisation eActionRm fehlerhaft' | 'Synchronization eActionRm faulty' | Possibly the wrong synchronization can be triggered by the input eActionPgm. This input overwrites the VAR_INPUT CONSTANT variable eActionRm to be monitored when occupied. |
'Synchronisation nDampConstant fehlerhaft' | 'Synchronization nDampConstant faulty' |
|
'Synchronisation fDerivativeConstant fehlerhaft' | 'Synchronization fDerivativeConstant faulty' |
|
'Synchronisation fIntegralConstant fehlerhaft' | 'Synchronization fIntegralConstant faulty' |
|
'Synchronisation fMaxOutputRm fehlerhaft' | 'Synchronization fMaxOutputRm faulty' | Possibly the wrong synchronization can be triggered by the input fMaxOutputPgm. This input overwrites the VAR_INPUT CONSTANT variable fMaxOutputRm to be monitored when occupied. |
'Synchronisation fMinOutputRm fehlerhaft' | 'Synchronization fMinOutputRm faulty' | Possibly the wrong synchronization can be triggered by the input fMinOutputPgm. This input overwrites the VAR_INPUT CONSTANT variable fMinOutputRm to be monitored when occupied. |
'Synchronisation fNeutralZone fehlerhaft' | 'Synchronization fNeutralZone faulty' |
|
'Synchronisation eOpMode fehlerhaft' | 'Synchronization eOpMode faulty' |
|
'Synchronisation fProportionalConstant fehlerhaft' | 'Synchronization fProportionalConstant faulty' |
|
Illustration
FUNCTION_BLOCK FB_BA_LoopSync
VAR_OUTPUT
bErr : BOOL;
sErrText : T_MaxString;
eErrState : E_BA_StateLoopSync;
END_VAR
VAR_IN_OUT
Loop01 : FB_BA_Loop;
Loop02 : FB_BA_Loop;
END_VAR
Outputs
Name | Type | Description |
|---|---|---|
bErr | BOOL | The output indicates when an error has occurred during synchronization. |
sErrText | T_MaxString | The variable shows the state of synchronization in text form. |
eErrState | The enumeration shows the state of the synchronization. |
/ Inputs Outputs
Name | Type | Description |
|---|---|---|
Loop1 | Reference to controller no. 1 of the parameter adjustment. | |
Loop2 | Reference to controller no. 2 of the parameter adjustment. |
Properties
Name | Type | Access | Description |
|---|---|---|---|
ErrText | T_MaxString | Get | The property ErrText displays the error texts from sErrText. |
Requirements
Development environment | Required PLC library |
|---|---|
TwinCAT from v3.1.4024.22 | Tc3_BA2 from v5.2.5.0 |