Siemens SINUMERIK 840D sl Programming Manual page 43

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The chaining function is implemented via operator: <<. This operator has STRING as the

target type for all combinations of basic types CHAR, BOOL, INT, REAL, and STRING.

Any conversion that may be required is carried out according to existing rules.

any type << any type

The strings specified (possibly implicitly converted non-string types) are concatenated.

This operator can also be used as a "unary" operator with a single operand. This can be

used for explicit type conversion to STRING (not for FRAME and AXIS).

Types FRAME and AXIS cannot be used with this operator.

The specified type is implicitly converted to STRING type.

This can be used to put together a message or a command out of text lists and insert

parameters into it (e.g. a module name):

MSG(STRG_TAB[LOAD_IDX]<<MODULE_NAME)

The intermediate results of string concatenation must not exceed the maximum string length.

Example: concatenation of strings

DEF INT IDX = 2

DEF REAL VALUE = 9.654

DEF STRING[20]STRG = "INDEX:2"

IF STRG == "Index:" <<IDX GOTOF NO_MSG

MSG ("Index:" <<IDX <<"/value:" <<VALUE)

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Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0

Flexible NC programming

Result type: STRING

;Display: "Index: 2/value: 9.654"

1.10 String operations