Stringsum - Omron NY532-5400 Reference Manual

2 Instruction Descriptions

StringSum

The StringSum instruction calculates the checksum for a text string.
Instruction
StringSum Checksum
Calculation
Variables
Name Meaning
In Text string
to process
Size Byte size
Out Checksum
Bit strings
In
Size
Out
Function
The StringSum instruction calculates the checksum of text string to process In. Checksum Out will be
the number of bytes specified with byte size Size. Out is given as a hexadecimal text string with a NULL
character stored at the end.
The following example is for when In is '1234' and Size is USINT#2.
LD
StringSum
EN
In
'1234'
USINT#2
Size
In
Character codes
31 32
If Size was USINT#1 in the above example, Out would be 'A'.
2-532
Name FB/FUN
FUN
I/O Description
Text string to process
Input
Byte size of checksum
Output Checksum
OK
ENO
abc
'1234'
Total calculated.
33 34
Graphic expression
(@)StringSum
EN ENO
In Out
Size
Valid range
Depends on data type.
1 or 2
Number of bytes speci-
fied by Size
Integers
ST
abc:=StringSum('1234', USINT#2);
Byte size Size = USINT#2
Out = abc 'CA'
NY-series Instructions Reference Manual (W560)
ST expression
Out:=StringSum(In, Size);
Unit Default
--- ''
Bytes 1
Bytes ---
Times, durations,
dates, and text strings
OK
OK