Siemens S7+ Endpoint Properties

address (string)

Direct memory address for absolute addressing mode. Supports access to data blocks (DB), input areas (I), output areas (Q), and memory areas (M). This is a proof-of-concept feature with limited testing. Use nodeId for production environments. Refer to Siemens S7 documentation for complete addressing syntax.

Examples: "DB1,B0.64", "DB1,R0.20", "PII30", "PIW30"

nodeId (string)

Hierarchical path to a symbol within the TIA Portal project structure. The path uses dot notation to navigate from the root PLC through program blocks to the specific variable. Each segment represents a level in the project hierarchy.

Examples: "PLC_1.Blocks.cnt_down_timer.ST", "PLC_1.Blocks.pulse.PT", "PLC_1.Blocks.Data_block_1.Temperature", "PLC_1.Blocks.Data_block_1.Lux"

dataType (string, enum)

Siemens S7 data type specification for the target variable. For array operations, this defines the data type of individual array elements (requires isArray to be true). Supported types include basic types (BOOL, INT, REAL), strings (STRING, WSTRING), and time types (TIMER, COUNTER).

This element must be one of the following enum values:

• X

• B

• BOOL

• BYTE

• C

• CHAR

• WCHAR

• WORD

• INT

• DWORD

• DINT

• REAL

• LREAL

• LINT

• S

• STRING

• WSTRING

• DT

• DTZ

• DTL

• DTLZ

• TIMER

• COUNTER

Examples: "DINT", "REAL", "BYTE"

isArray (boolean)

Indicates whether the target variable is an array. When true, the operation will read/write multiple consecutive elements of the specified data type. Must be used in conjunction with arrayLength.

Default: false

arrayLength (integer)

Number of consecutive elements in the array as configured on PLC. Required when isArray is true for the chosen dataType.

Additional restrictions:

• Minimum: 1

browse (string, enum)

This parameter is reserved for future use. It currently has no effect.

This element must be one of the following enum values:

• flat

• hierarchical

• datablocks

Example: "flat"

interval (integer)

Polling frequency (in milliseconds) for subscribe operations using best-effort polling. Determines how often the system reads data from the PLC. Lower values provide more real-time data but increase network and CPU load.

Default: 1000

Example: 2000