The Modbus RTU Slave Interface logs informational, warning, and error messages to the CIMPLICITY project status log. These messages include the following:

Message	Cause / Resolution
Program startup completed successfully	Informational message - no action required.
Program shutdown completed successfully	Informational message - no action required.
Memory allocation error	Error creating an internal data structure. Increase available memory by stopping non-essential applications.
Error opening communication port channel: x.	Error occurred while connecting to the given COM port. Ensure that the given COM port is valid.
Error coercing Modbus value to CIMPLICITY point value (see next message).	The value of the given CIMPLICITY point cannot be converted to the mapped Modbus memory type. Ensure that the value is within the Modbus Register Limits. Ensure that the data type is supported
On-change response coercion error for point: <point id>.	(see the previous message)

Important: The Modbus RTU Slave Interface also logs messages intended for use by GE Fanuc support personnel. If any of the following messages are logged, please contact your CIMPLICITY vendor for support.

Error initializing protocol layer object: xxx.

Error registering slave addresses in protocol layer object: xxx

Thread creation failed.

Error occurred while waiting for thread to exit.

Event object creation failed.

Error occurred while setting event object.

Failed to allocate an event flag from PTMAP subsystem.

Error occurred while waiting for a response from the PIL worker thread.

An invalid PTMAP response message was received. Response ignored.

Invalid register count: xxx.

Duplicate entry detected for slave address xxx, register class xxx.

More information

CIMPLICITY status log.

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