Twincat hexadecimal string conversion

allemel · Feb 21, 2013

Hi,

i want to convert a hexadecimal string like 'FFFFFD0E' to integer. i know it equals -754. but i can not convert it in twincat. i can do it in .net easily(convert.int32) but i can not find how to do with twincat. there is a function dword_to_hexstr but i can not find any hexstr_to_dword function or something does the same thing. Is there anyone knows how can it be done. Thanks.

shooter · Feb 21, 2013

answer:
DWORD_TO_DINT
it is a conversion
when pressing F2 it is in a long list of type conversions.
because you have a dword you will need a dint to get the full range
after this you can convert to real.

shooter · Feb 21, 2013

sorry if it is a string first convert from STRING_TO_DWORD
direct is also possible STRING_TO_DINT

allemel · Feb 22, 2013

shooter thanks for your help but STRING_TO_DINT conversion gives me zero, so does not work

AJZ · Feb 22, 2013

I use the following code to convert a string to a integer:

nStringLength := LEN (File.Data[10]);
nStringLengthMinus := nStringLength-1;
MachineParams.nClampTime := STRING_TO_DINT(LEFT (File.Data[10], nStringLengthMinus ));

shooter · Feb 22, 2013

sorry allemel
the string needs conversion to a dword
STRING_TO_DWORD
then the DWORD_TO_DINT
you can aslo have a look at www.oscat.de for more function blocks

allemel · Feb 26, 2013

i found the solution

sHex02 := CONCAT('16#','FFFFFD0E');
iDInt := STRING_TO_DINT(sHex02);

it works. thanks for your help

Twincat hexadecimal string conversion

allemel

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