String To Dint (Stod); Relay Ladder; Structured Text - Allen-Bradley Logix5000 Reference Manual

String To DINT (STOD)

STOD
String To DINT
Source
Dest
Operand Type
Source String
Destination SINT
INT
DINT
REAL
STOD(Source,Dest);
Description:
Arithmetic Status Flags:
Fault Conditions
Type Code Cause
4 51 The LEN value of the string tag is greater than the DATA size
of the string tag.
4 53 The output number is beyond the limits of the destination data
type.
ASCII Conversion Instructions (STOD, STOR, DTOS, RTOS, UPPER, LOWER)
The STOD instruction converts the ASCII representation of an integer to an
integer or REAL value.
Operands:

Relay Ladder

?
??
?
??
Format
Tag
Tag

Structured Text

The operands are the same as those for the relay ladder STOD instruction.
The STOD converts the Source to an integer and places the result in the
Destination.
· The instruction converts positive and negative numbers.
· If the Source string contains non-numeric characters, the STOD converts
the first set of contiguous numbers:
– The instruction skips any initial control or non-numeric characters
(except the minus sign in front of a number).
– If the string contains multiple groups of numbers that are separated by
delimiters (for example, / ), the instruction converts only the first group
of numbers.
Arithmetic status flags are affected.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Enter
Tag that contains the value in
ASCII
Tag to store the integer value
Recovery Method
1. Check that no instruction is writing to the LEN member of
the string tag.
2. In the LEN value, enter the number of characters that the
string contains.
Either:
·Reduce the size of the ASCII value.
·Use a larger data type for the destination.
Notes
String data types are:
·default STRING data type.
·any new string data type that you create.
If the Source value is a floating-point number, the
instruction converts only the non-fractional part of
the number (regardless of the destination data type).
Chapter 19
623