Standard Import Rules

You can configure the rules for importing the object definitions for the objects of a particular Modbus family and the system data type functions associated with those objects from the Import Rules tab. You can access this tab from the Management View by navigating to Project > System Settings > Libraries > L1-Headquarter > Global > Modbus > Import Rules.

Each Import Rules library element contains the rules for a specific product family (such as Modbus and so on).

Using Import Rules, you can define the objects and properties for the import rules using the Objects and Properties expander. You can create another object with Copy Object and delete an object with Remove Object.

Import Rules Toolbar
Icon	Name	Description
	Save	Save any changes. NOTE: Saving the imports rules also activates them.

NOTICE

Modifying the Import Rules

Modifying the Import Rules may seriously affect the system's behavior and should always be done by a qualified system librarian. Do not modify any of such rules unless you know exactly what you are doing.

Objects and Properties Expander for Standard Import Rules

The Objects and Properties expander allows you to set the standard Import Rules.

These rules are responsible for mapping the system defined object models to the Modbus data types. They also define the Function Codes applicable to the particular data type and assign the direction of communication for a field point of an object model.

For example, consider the first row in the following screenshot.

Suppose, in the CSV, you specify BOOLEAN as ModbusType, 1 as the Function Code and Input as the Direction. Then while creating the instance, the Importer will create an instance of GMS_MODBUS_BinaryInput and assign Boolean as TransformationType in the address configuration.

Objects and Properties Expander Fields
	Description
ModbusType	Displays the Modbus types (objects) contained in the Modbus CSV file.
Direction	Displays the directions of the object:Input/Output.
FunctionCode	Displays the Function code contained in the Modbus CSV file
TransformationType	Displays the transformation types. Refer to the Table Transformation Types below.
Object Model	For each Modbus type, you can select or edit a specific object model.
Add Object	Adds a new import rules entry to the table.
Copy Object	Copy the selected object to the table.
Remove Object	Remove the selected object from the table.

You can change the configuration of existing objects, create new entries, or removed unwanted object entries.

NOTE:
The customization does not impact the standard import rules since the import rules are not copied to a higher priority level. The Importer reads and sets the rules from the headquarter level only.

Transformations from CSV to PVSS
ModbusType (CSV)	Direction	Function Code	Code Meaning	Transformation Type (PVSS)
BOOLEAN	Input	1	Read Coils	boolean
BOOLEAN	Input	2	Read Discrete Inputs	boolean
BOOLEAN	Input	3	Read Holding Registers	boolean
BOOLEAN	Input	4	Read Input Registers	boolean
BOOLEAN	Input	7	Read Exception Status	boolean
BOOLEAN	Output	5	Write Single Coil	boolean as byte
BOOLEAN	Output	6	Write Single Register	boolean
BOOLEAN	Output	15	Write Multiple Coils	boolean
BOOLEAN	Output	16	Write Multiple Registers	boolean
INT16	Input	3	Read Holding Registers	Int16
INT16	Input	4	Read Input Registers	int16
INT32	Input	3	Read Holding Registers	int32
INT32	Input	4	Read Input Registers	int32
INT32	Input	24	Read FIFO Queue	int32
INT64	Input	3	Read Holding Registers	int64
INT64	Input	4	Read Input Registers	int64
INT64	Input	24	Read FIFO Queue	int64
UNIT16	Input	3	Read Holding Registers	uint16
UINT16	Input	4	Read Input Registers	uint16
UINT32	Input	3	Read Holding Registers	uint32
UNIT32	Input	4	Read Input Registers	uint32
UNIT32	Input	24	Read FIFO Queue	uint32
UINT64	Input	3	Read Holding Registers	uint64
UINT64	Input	4	Read Input Registers	uint64
UINT64	Input	24	Read FIFO Queue	uint64
INT16	Output	6	Write Single Register	int16
INT16	Output	16	Write Multiple Register	int16
INT32	Output	16	Write Multiple Register	int32
INT64	Output	16	Write Multiple Register	int64
UNIT16	Output	6	Write Single Register	uint36
UNIT16	Output	16	Write Multiple Register	uint16
UNIT32	Output	16	Write Multiple Register	uint32
UINT64	Output	16	Write Multiple Register	uint64
FLOAT32	Input	3	Read Holding Registers	float
FLOAT32	Input	4	Read Input Registers	float
FLOAT32	Output	16	Write Multiple Register	float
FLOAT64	Input	3	Read Holding Registers	double
FLOAT64	Input	4	Read Input Registers	double
FLOAT64	Output	16	Write Multiple Register	double