Rockwell-automation Logix5000 Controllers ASCII Strings Programming Ma Manuale Utente Scaricare il pdf (Pagina 24)

Chapter 2 Processing ASCII characters

Example: When bag_flt_and_dest is equal to gate[1], xfer[1] turns on. This routes the bag to the required gate.

You can convert the ASCII representation of a value to an DINT or REAL value

that you can use in your application.

• The

STOD and STOR instructions skip any initial control or non-numeric

characters (except the minus sign in front of a number).

•

f the string contains multiple groups of numbers that are separated by

del

imiters (for example, / ), the STOD and STOR instructions convert only

the first group of numbers.

The following rung converts ASCII characters to a floating-point value:

Example:

After reading the weight from the scale (weight_read.EM is on), the STOR instruction converts the

numeric characters in weight_ascii to a REAL value and stores the result in weight.

The following rung converts ASCII characters to an integer value:

Example:

When MV_read.EM is on, the STOD instruction converts the first set of numeric characters in MV_msg to

an integer value. The instruction skips the initial control character ($06) and stops at the delimiter ( \ ).

Convert a value

24 Rockwell Automation Publication 1756-PM013D-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers ASCII Strings Programming Ma Manuale Utente Pagina 24