4 Using Additional Functions - Special Features to Note
Errors when Adding Variables
SVariable cannot be added
Adding some or all variables is denied in the Navigator of the OPC Scout. Possible causes for this are as follows:
-The variable name entered does not have the correct syntax.
-When using symbolic variables: The symbol file does not match the project engineering configuration.
-The access permissions for the variables are restricted: Neither read nor write permissions.
SA protocol or connections are not visible
No protocols are visible in the
-Some of the required connections were not created during configuration in the project engineering.
-A module configured in the project engineering does not exist or was not correctly initialized.
-The configuration data created in the project engineering configuration have not yet been transferred or transfer was unsuccessful.
Checking the status of process variables
SQuality of the variables is “bad”.
In the table view of the process variables, the value “bad” is entered for some or all variables in the “Quality” column. Possible reasons for this are as follows:
-The network connection to the partner device is down.
-The partner device is not configured in the project engineering.
-The bus parameters of the PC station and partner device do not match.
SThe value of the information variable for the connections status is “Down”.
The information variable has the quality “good”, however, the value is not “Up”.
These variables are generated by the OPC Server and always have the quality “good”. The possible reasons for the value on the variable identical to those for quality = “bad”.
Commissioning PC Stations - Manual and Quick Start | 51 |
Release 5/2005 |
