There are several diagnostic tools available to the user. These tools are particularly valuable if runtime behavior deviates from expected behavior. They can help isolate and troubleshoot the erroneous or erratic behavior of a working system.

Diagnostic tools include the following:

	CIMPLICITY status log.
	Protocol stack trace log
	Modbus exception codes.
	Test program.

More information

	Expected Modbus RTU Slave runtime behavior.
	About Modbus RTU Slave Communications.

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