I am getting an Invalid expression error on tags that I try to use bitwise operators. I found the Rockwell technote - E50265342 - Invalid Expression: Invalid Floating Point Operation - did what it says, but I am still getting the error.
I am converting the application from a 1400e with Block transfers.
Thanks!
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Rockwell Technote
RSView Machine Edition
3.0
Expression causes a diagnotic error message and the expression does not work.
This is caused by using bitwise operators with a Default data type in an HMI tag
A diagnostics errror message is created when the display is opened at runtime, or the display is test run in RSView Studio.
Use direct reference tags or change the HMI Tag data type to an integer data type.
Always specify a data type when creating integer HMI tags. This is automatically done if the Tag Browser is used to select tag addresses.
Problem
Expression causes a diagnotic error message and the expression does not work
"Unable to activate connection"
"Invalid expression: Invalid floating point operation"
Cause
This is caused by using bitwise operators with a Default data type in an HMI tag. Bitwise operators are only valid for integer tags. The default data type means that the HMI tag can act as a floating point tag or an integer tag.
Example expression: Tag & 3
Solution Use direct reference tags or change the HMI Tag data type to an integer data type. This can be easily done by exporting the tag database to a CSV file (Tag Import/Export Wizard) and then changing all the required tags to Integer data type (Change column H "Native Type" to an uppercase i "I" for each required tag). Once this is done, import the CSV file back into the ME application. You will need to restart RSView Studio before the tag changes are updated.
Always specify a data type when creating integer HMI tags. This is automatically done if the Tag Browser is used to select tag addresses
I am converting the application from a 1400e with Block transfers.
Thanks!
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Rockwell Technote
E50265342 - Invalid Expression: Invalid Floating Point Operation
Last Modified: 07/02/2003
Last Modified: 07/02/2003
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Problem
Expression causes a diagnotic error message and the expression does not work
"Unable to activate connection"
"Invalid expression: Invalid floating point operation"
Cause
This is caused by using bitwise operators with a Default data type in an HMI tag. Bitwise operators are only valid for integer tags. The default data type means that the HMI tag can act as a floating point tag or an integer tag.
Example expression: Tag & 3
Solution Use direct reference tags or change the HMI Tag data type to an integer data type. This can be easily done by exporting the tag database to a CSV file (Tag Import/Export Wizard) and then changing all the required tags to Integer data type (Change column H "Native Type" to an uppercase i "I" for each required tag). Once this is done, import the CSV file back into the ME application. You will need to restart RSView Studio before the tag changes are updated.
Always specify a data type when creating integer HMI tags. This is automatically done if the Tag Browser is used to select tag addresses
