Ascii data value to integer file

[mohamed_idris]

Please Help On Allen Bradley PLC SLC500

I'm receiving Ascii string data values from a serial devices and put the value into a string file; How can I transfer these Ascii value to integer file (N) for manipulation

<DLE><STX>1A1L000015000505IÁ<DLE><ETX>
My Ascii Data is: 1A1L000015000505

I have tried to use string to integer instruction (ACI) does not give out the result.
Hex value: 10023141314C30303030313530303035303549C11003

 

[bernie_carlton]

Your 'data' is not an integer. The String To Integer command will not retrieve this.

 

[controlconcepts]

Use the COP instruction and the length of the COP length is 1 for two charterers 10 for twenty charterers.

 

[mohamed_idris]

Shifting values from N file 16 bit to 8bit

Hi Thanks

I have done copy now it working but the values are on 16bit registers
On Hex\BCD Radix it gives 3155 3133
How can represent into this format on the same Radix:
31 55 31 33
Open attachment for the image

 

[Lancie1]

How can I represent [the original string] into this format on the same Radix:
31 55 31 33

It is not clear what you want to do. What is the type of number that you want to end up with (String, Integer, ASCII, Floating Point)?

If you want to convert a String (that has unwanted characters at beginning and end) to an Integer number, then first do a String Extract (AEX), with Index = 5, Number = 12. This will pull out only the number that you want. Then do ACI to convert those 12 characters to an Integer number.

Step 1: Create a ST (String) file, say "ST9" of type STRING. Then use AEX (String Extract) with an Index = 5, Length = 12, to extract only the portion of the string that you wish to convert to a number. Step 2: Convert the new 12-character string to an integer number.

 

[mohamed_idris]

Hi

Yes I have done that using String Extract (AEX)
My string Values are: ^P^B1U13\00)7^P^C
Extracted Ascii value: 1U13\00
Hexadecimal values: 3155 3133

But when I use string to integer (ACI)
I'm getting: ^A at N file
Open attachment for the pictures:

 

[Lancie1]

You are trying to put a String into an Integer file register (mixing file types does not usually work very well).

Try reversing the order of your last two instructions.
(1) Do AEX to a ST-type file location, then
(2) ACI to convert the extracted String to an Integer number type and store at N38:110, then
(3)do the COP (only if you want a copy of the Integer number at another Integer location).

For the AEX to always work, your Strings must be the same length with the same number of unwanted characters at the beginning and end. If your Strings vary in length, you will have to do some other operations to find the number you want to extract.

When using the ACI, your ASCII number must be in the range of -32767 to 32767. If it is bigger or smaller, you must not use ACI, but will have to write a routine to convert from ASCII characters to a F8 floating-point number. There have been routines posted on this site to do that conversion.

 

[mohamed_idris]

Hi
I was just showing that on the copy function (COP)I'm able to get these value but on 16 bit register representation
(3155) (3133)
While I need my values to be (31) (55) (31) (33)
Still once I do AIC the string length is indicating less than one 1<
Let me do on a new string file

 

[Lancie1]

Do you want to convert the initial String into a Hexadecimal number (and NOT a Decimal number of any type (Integer, Long Integer, Floating Point)? If so, you cannot do that using the ACI (ASCII to Integer conversion).

I think you need a routine to convert an ASCII character string into a Hexadecimal number. See the solutions in these threads:

http://www.plctalk.net/qanda/showthread.php?t=28833&highlight=ASCII+hexadecimal+number

http://www.plctalk.net/qanda/showthread.php?t=2012&highlight=ASCII+hexadecimal+number

If you want to convert an ASCII string into 4 hexadecimal numbers, then first use AEX for 4 cases, where your extract the string part that represents each of the 4 numbers and store it into a new string, then use a conversion routine to convert each of the 4 new strings into a Hexadecimal number.

 

[mohamed_idris]

sorry
Instruction code ACI

 

[mohamed_idris]

Hi Lancie

Thanks
Good day
Let me go through the links; Hope now will work

 

[mohamed_idris]

I have gone through the link and it is working on both cases
Case One: Extract the single Ascii character from the string file by use of AEX and convert that SINGLE character to integer by use of ACI and copy to N file.
Case Two: Use what has been proposed by Allen Nelson on the link: http://www.plctalk.net/qanda/showthread.php?t=2012&highlight=ASCII+hexadecimal+number
Which method do you think is much better to work with ASCII data.

 

[Lancie1]

If Case 1 is working for you, it means you really wanted an Integer-type number (not a hexadecimal output), so use this one because it is much easier and shorter.