String Parameters; String Processing Functions - HEIDENHAIN TNC 640 User Manual

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Programming Q Parameters | String parameters

10.10 String parameters

You can use the QS parameters to create variable character strings.

You can output such character strings for example through the D16

function to create variable logs.

You can assign a linear sequence of characters (letters, numbers,

special characters and spaces) up to a length of 255 characters to

a string parameter. You can also check and process the assigned

or imported values using the functions described below. As

in Q parameter programming, you can use a total of 2000 QS

Further information:

"Principle and overview of functions",

The STRING FORMULA and FORMULA Q parameter functions

contain various functions for processing the string parameters.

Functions of the STRING FORMULA

Assigning string parameters

Read out machine parameter

Chain-linking string parameters

Converting a numerical value to a

string parameter

Copy a substring from a string

Read system data

Formula string functions

Converting a string parameter to a

numerical value

Checking a string parameter

Finding the length of a string parame-

Compare alphabetic priority

When you use the STRING FORMULA function, the

result of the arithmetic operation is always a string.

When you use the FORMULA function, the result of the

arithmetic operation is always a numeric value.

HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017