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What would cause "Controller's configuration not equal to configuration database. (Miscompare at word 81.)" when trying to connect to a Quantum Hot Standby PLC with Concept?

Word 81 is the Modbus port #1 address and this error is usually seen when trying to connect to the Quantum Standby PLC and the Modbus address is offset by 128. If the Modbus port #1 address is set to 1 in the Concept Project, you need to change the address to 129 so it will match the Standby's Modbus port #1 address and thus eliminating the miscompare.

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