FB_MTP_AnaProcessValueIn
The function block FB_MTP_AnaProcessValueIn provides an analog process value V with the associated ValueQualityCode VQC from a higher-level system (e.g. via OPC UA).
The variables UnitCur, SclMinCur and SclMaxCur are used to display the current unit and the current value scaling.
Applying a new configuration
A new configuration is specified via the variables UnitExt, SclMinExt and SclMaxExt.
To change the configuration (unit and value scaling), an array of the type ST_MTP_InputElementConfig with a list of supported configurations is transferred on the PLC side via the input variable Configs. The value scaling for the respective units is stored in this array.
Enabling the application of the configuration is signaled on the PLC side by the variable ApplyEn = TRUE. The application can then be requested via the variable Apply = TRUE.
During the application, UnitExt is compared with the stored possible limit values in Configs. If the limit is exceeded or not reached, the stored upper or lower limit value is used.
Inputs
Name | Type | Description | OPC UA access |
|---|---|---|---|
TagName | STRING | Name of the interface | - |
TagDescription | STRING | Description of the interface | - |
WQC | BYTE | Worst Quality Code | Read |
Configs | ARRAY [*] OF | Possible configurations | - |
ApplyEn | BOOL | Enable for request: | Read |
Outputs
Name | Type | Description | OPC UA access |
|---|---|---|---|
VQC | BYTE | Quality Code for the value | Read/write |
OSLevel | BYTE | Level must be defined for system. Value 0 is reserved for local operation. | Read/write |
V | REAL | Incoming process value via OPC UA | Read/write |
UnitCur | INT | Current unit | Read |
SclMinCur | REAL | Current scale start | Read |
ScIMaxCur | REAL | Current scale end | Read |
UnitExt | INT | Configuration input for the unit | Read/write |
SclMinExt | REAL | Configuration input for the scale start | Read/write |
SclMaxExt | REAL | Configuration input for the scale end | Read/write |
Apply | BOOL | Requirement: | Read/write |