S7TCP driver

Observe these guidelines when working with the S7TCP driver.

Supported controllers

The driver supports these controller families:

The driver supports only non-optimized structures.

You can import tags in these modes:

Online mode

Use online mode to import tags directly from the controller at design time or runtime.

Important:

Before importing tags from a controller:

Set Access level to a Full access option.
Enable the Permit access with PUT/GET communication from remote partner option.
If applicable, disable the Only allow secure PG/PC and HMI communication option.

For more information, refer to the product documentation.

Offline mode

Use offline mode to import tags from these project files: ap13, ap14, ap15, ap16, ap17, ap18.

Important:

Before importing tags from a project file:

Ensure that the project file is compiled with the Optimized block access property enabled.
If your project has multiple programs, choose the program from which you want to import the tags.

For more information, refer to the product documentation.

The driver supports these data types:


Controller data type	FactoryTalk Optix data type	Length	Notes
BOOL	BOOL	1 BIT
BYTE	BYTE	1 BYTE
WORD	UINT16	2 BYTES
DWORD	UINT32	4 BYTES
LWORD	UINT64	8 BYTES
SINT	SBYTE	1 BYTES
INT	INT16	2 BYTES
DINT	INT32	2 BYTES
USINT	BYTE	1 BYTE
UINT	UINT16	2 BYTES
UDINT	UINT32	4 BYTES
LINT	INT64	4 BYTES
ULINT	UINT64	8 BYTES
REAL	FLOAT	4 BYTES
LREAL	DOUBLE	8 BYTES
S5TIME	UINT32	2 BYTES	For more information about the time base, refer to the product documentation.
TIME	DURATION	4 BYTES
LTIME	DURATION	8 BYTES
DATE	DATE	2 BYTES
TIME_OF_DAY(TOD)	UTC TIME	4 BYTES
LTIME_OF_DAY(LTOD)	UTC TIME	8 BYTES
DATE_AND_TIME(DT)	DATE TIME	8 BYTES
DTL	Struct	12 BYTES
CHAR	SByte	1 BYTES
WCHAR	UINT16	2 BYTES
STRING	STRING-MAX254	LENGTH +2 BYTES	An operand of the STRING data type occupies two bytes more than the specified maximum length in the memory. For more information, refer to the product documentation.
WSTRING	STRING-MAX 254	LENGTH+2 WORDS	An operand of the WSTRING data type occupies two WORDs more in the memory than the specified maximum length. For more information, refer to the product documentation.
STRUCT	STRUCT
Timer	UINT32	4 BYTES
COUNTER	UINT16	2 BYTES
IEC_Timer	Struct	16 BYTES
IEC_LTimer	Struct	32 BYTES
IEC_SCounter	Struct	3 BYTES
IEC_USCounter	Struct	3 BYTES
IEC_Counter	Struct	6 BYTES
IEC_UCounter	Struct	6 BYTES
IEC_DCounter	Struct	12 BYTES
IEC_UDCounter	Struct	12 BYTES
IEC_LCounter	Struct	24 BYTES
IEC_ULCounter	Struct	24 BYTES
ARRAY 1 dimensional	Type [dimension]
ARRAY 2 dimensional	Type [1st dimension, 2nd dimension]
ARRAY 3 dimensional	Type [1st dimension ,2nd dimension, 3rd dimension]