Errors for variables within Values of Variables view

This section quotes all errors that might occur for variables that have been inserted in the Values of Variables view.
You get hints for eliminating the errors unless the solution is self-evident.

Could not navigate to variable because it could not be found.
Solution: Load the application onto the PLC. Insert the variable into Values of Variables view in order to synchronize the view. Then try to go to the declaration of the variable again.

No connection to target system
Solution: Check the settings within the PLC-object (IP address and port). Make sure that the PLC can be accessed via the network.

Incomplete data acquisition (too much variables requested).
 Solution: In the view, delete the variables that are not relevant right now. Insert the required variables again into the view .

Incomplete data acquisition (one or more variables do not exist in the PLC)).
Solution: In the view, delete the variables for that no value is displayed.

Access to the variable has been denied.
As additional information: The access to the variable has probably been denied when writing a value.

Solution: Open the PLC Logging view and check whether an alarm message detailing the error cause is displayed. If yes, proceed as indicated by this message.

Solution, if the access has been denied when requesting a value: Contact the support team of logi.cals. Include your contact information, information on what you were doing in logi.CAD 3 and all messages listed in

the Error Log view, Problems view and/or PLC Logging view.

Failed data request for variables within the "Values of Variables" view. Details: Configuration "name" not found .
As additional information: The name of the configuration has probably been changed since the variables for the specified configuration has been inserted into the view Values of Variables.
Solution: Insert the required variables from the renamed configuration into the view. Alternative: Close the view, change the name of configuration and open the view again so that the variables from the specified c onfiguration are found in case of the new data request.

Cannot write the value onto the PLC because this is a CONSTANT variable.
It is not possible to overwrite values for →constant variables during the execution of the application.

One or more variables have not been inserted due to recursions. Check the Problems view for details. or
One or more variables have not been inserted due to errors in the code. Check the Problems view for details.
Solution: Fix the errors reported in the "Problems" view.

The data type in the saved application does not match the data type on the PLC.
Solution: Load the application onto the PLC. Then, the application on the PLC will match the one in logi.CAD 3, and the data type accordingly.

Information for variable could not be determined. or
Target value could not be converted.
Solution, if the current version has not been loaded on the PLC: Load the application onto the PLC. Then, the application on the PLC will match the one in logi.CAD 3, and the variable will exist on the PLC.
The values for the variables might not be displayed anyway. Possible causes:

  • The target system does not support the query of DMA variables.

  • The target system cannot provide the values due to other reasons (siehe "Properties and restrictions specific to the target system") or no correct connection to the target system is possible (see No connection to the target system, but there are error messages).

  • The variable is a →reference variable that has been initialized with value NULL . logi.CAD 3 is not able to display values for such variables.

  • The variable is a variable based on an →interface . logi.CAD 3 is not able to display values for such variables.

  • logi.CAD 3 has been started with the option LC3useRTS3MetaData=false. – In this case, logi.CAD 3 is not able to display values for variables. Solution: Make sure that the generation of metadata is enabled before logi.CAD 3 is started.

    1. Go to the folder where you installed logi.CAD 3.

    2. Locate the file logiCAD3.ini and open it in a text editor.

    3. Search for -DLC3useRTS3MetaData.

    4. If this configuration variable is defined with value false, define the value true.

      Example for corrected lines
      ...
      -Xms256m
      -Xmx6144m
      -DLC3useRTS3MetaData=true

      images/s/b2ic8e/9012/1ca6q62/_/images/icons/emoticons/information.svg By default, the generation of metadata is activated in logi.CAD 3. However, the generation has been deactivated due to -DLC3useRTS3MetaData=false (after the option -vmargs).

    5. Save the file.

Solution, if the value is not displayed because of the above causes: In the Values of Variables view, delete the variable that has caused the problem.

Index needed for array variable: Press F2 for the selected variable and enter the index (e.g. [2] or [2..5] or [2..5, 7, 9]
Solution: Complete the inserted item by the requested array index. Proceed as described under "Replacing already inserted variables".

Value "number" with data type "name" cannot be written to the PLC.
Solution: Make sure that the connection to the PLC is established (because e.g. values for other variables are displayed ).

Forcing is not supported for PLC "name".
Additional information: For forcing, you need a runtime system that supports forcing (e.g. the built-in PLC). Ask the manufacturer of the runtime system whether forcing is supported.

Forcing of too many variables
Solution: For some variables within the Values of Variables view, delete the prepared value that is entered in the column Prepared value. Try to force the remaining, prepared values again. Details: See "Forcing the values of variables".

Force value is too long
Solution: Within the Values of Variables view, shorten the prepared value that is causing the problem and that has been entered in the column Prepared value. Usually, this value is a STRING value. Try to force the prepared values again.

Inserting items into the "Values of Variables" view exceeded the supported maximum number of items. Only the first number items have been inserted.
Additional information: The simultaneous inserting of variables into the Values of Variables view has been restricted to 100 elements so that logi.CAD 3 is not blocked too long by an inserting action.
Solution: In the Instances view, select the variables for which you want to monitor the values as well. Drag these variables into the Values of Variables view as well.