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What does Unity message "Due to alignment constraint, you have to decrease or increase topological address index of 1 : xxxxxxx" indicate?
Issue
When trying to build a project, the above message appears.

Product line
Unity Pro, Control Expert, Modicon M340, Modicon M580

Resolution
This message means that a double word type variable was created and located to an odd numbered Modbus address. For example if you create a variable Type REAL and locate it to %MW11, you would see this message.
It is suggesting that you either make the address %MW12 or %MW10. The M340 and M580 do not support an ODD address located to a double word variable type.


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