Data - page of object PmOpcClientData

Description:

Data definition of the OPC group. The form of the page is common to more PROMOTIC objects and hence the common description is stated in the description of PmObject > Data page. Only configuration items of one variable are described here, the ones that are specific only for this object.

Buttons:

New	The Variable window is opened where new variable can be added.
Multi new	The Multi items adding window is opened where any number of variables can be added.
Edit	The Variable window is opened the marked variable can be edited.
Delete	Removes the marked variable.
Up	It is possible to change the order of variables. By pressing the Up/Down button the marked item will be moved upward/downword in the list. The same effect can be achieved by pressing the key combination ALT+up key/down key.
Down	It is possible to change the order of variables. By pressing the Up/Down button the marked item will be moved upward/downword in the list. The same effect can be achieved by pressing the key combination ALT+up key/down key.
Sort	If sorts variables in the alphabetical order by the variable name. The order of variables is changed. Be careful in cases when variables are accessed not by the name but by index (order).
Export	It is possible to export the data of items of this page XML file - see Data export to the XML text file. Various export types to the XML file are described in Import/Export in the application editor. CSV file - see Data export to CSV text file
Import	It is possible to load (import) the data into this page. XML file - see Data import from XML text file CSV file - see Data import from CSV text file Selection from OPC server - This item is available only in the PmOpcClientData object. It opens the "Browsing the OPC server address space" window. On the selected level, it is possible to select multiple variables (by using the Ctrl, or Shift key), that are then added into this page.
Extensions	Opens the List of data extensions window, displaying a list of all found data extensions (defined anywhere in the application), designed for this specific target object (see the configurator "Target object" in the data extension).

Configuration items variables - basic:

Name	Name of the variable (no diacritics, no spaces, must start with a letter). This configurator sets the initial value of the property Name.
Data type	Data type of a variable. This data type is preserved in the variable and written values are converted into this data type. The exception is the Variant data type indicating that the variable preserves the last written value with its data type. Thus even an array can be stored in the variable (not allowed with the PmRtFree license).
Value	Here you can define - the value (expression), that will be assigned to the variable at application start, or - the data binding to another value. See property Value and see Data binding configuration. Macro expression can be used for input (it is evaluated while the application is launching).
Rounding	If checked, then the value in the variable will be rounded do defined accuracy on each writing. It is functional only for numeric data types (Double, Single, Long, Short, Byte). See also Pm.Round.
Accuracy	Positive number indicating accuracy (number of decimal or whole places) to round the number to. For example: 0.01 = rounding to hundreths 0.1 = rounding to tenths 0.5 = rounding to five tenths 1 = rounding to whole numbers 10 = rounding to tens 25 = rounding to the closest multiple of 25
Note	Note for better orientation in the project, applicable through the script interface even in the running application. This configurator sets the initial value of the property Note. Macro expression can be used for input (it is evaluated while the application is launching).

Configuration items variables - extended by data extension ExtOpcClient:

ItemID	Text address/identifier of the variable on the OPC server. The address can be entered either manually or it can be selected from the window "Browsing the OPC server address space" that can be opened by the button right from the input. But the selective window can be opened only if the OPC server is installed and if it supports the selection. This configurator sets the initial value of the property ItemId. Macro expression can be used for input (it is evaluated while the application is launching).
AccessPath	Access path to the variable on the OPC server. This value can often be empty. The path can be entered either manually or it can be selected from the selective window that can be opened by the button right from the input. But the selective window can be opened only if the OPC server is installed and if it supports the selection. This configurator sets the initial value of the property AccessPath. Macro expression can be used for input (it is evaluated while the application is launching).
Value recalculation	If checked, then the received and sent value will be recalculated by the PmValue = k/d * CommValue + q formula, where PmValue is the value in the PROMOTIC system, CommValue is the value from the communication, k,d,q are the recalculation constants defined in the configurator. The conversion is applied also when sending the value. Then the inversion conversion is done according to the expression CommValue = d/k * (PmValue - q). Caution: Vhen sending the value with conversion, some inaccuracy may happen and so the PmValue sent could differ from the PmValue received. For example for the conversion of PmValue = 1000 * CommValue and if CommValue is the value on 1B (Range 0-255), then when sending the PmValue=2008 the CommValue=2 is sent. If the CommValue=2 is received, then the PmValue will be 2000.

ItemID

Text address/identifier of the variable on the OPC server. The address can be entered either manually or it can be selected from the window "Browsing the OPC server address space" that can be opened by the button right from the input. But the selective window can be opened only if the OPC server is installed and if it supports the selection.

This configurator sets the initial value of the property ItemId.

Macro expression can be used for input (it is evaluated while the application is launching).

AccessPath

Access path to the variable on the OPC server. This value can often be empty. The path can be entered either manually or it can be selected from the selective window that can be opened by the button right from the input. But the selective window can be opened only if the OPC server is installed and if it supports the selection.

This configurator sets the initial value of the property AccessPath.

Macro expression can be used for input (it is evaluated while the application is launching).

Value recalculation

If checked, then the received and sent value will be recalculated by the PmValue = k/d * CommValue + q formula, where PmValue is the value in the PROMOTIC system, CommValue is the value from the communication, k,d,q are the recalculation constants defined in the configurator.

The conversion is applied also when sending the value. Then the inversion conversion is done according to the expression CommValue = d/k * (PmValue - q).

Caution: Vhen sending the value with conversion, some inaccuracy may happen and so the PmValue sent could differ from the PmValue received. For example for the conversion of PmValue = 1000 * CommValue and if CommValue is the value on 1B (Range 0-255), then when sending the PmValue=2008 the CommValue=2 is sent. If the CommValue=2 is received, then the PmValue will be 2000.