INT to Real Datatype Conversion - PLCS.net

ss4884 · March 23rd, 2009, 04:47 AM

Hi,
can anyone help me out by guiding me how to perform INT to REAL Conversion..Pls It urgent

bkottaras · March 23rd, 2009, 04:50 AM

Quote:

Originally Posted by ss4884

Hi,
can anyone help me out by guiding me how to perform INT to REAL Conversion..Pls It urgent

Most PLCs have a build in function block of sorts that will do that for you.
Not sure if you have read the help files or the manual but it is in there, give it a try.

ss4884 · March 23rd, 2009, 05:05 AM

I tried but i didnt find any in siemens we have some standard instruction to do so but i didnt find the same in control logix. can you please help me out with some other suggestion

OZEE · March 23rd, 2009, 05:08 AM

What PLC? Every PLC does it differently...

Have you just tried a copy from your int into the new real??

L D[AR2,P#0.0] · March 23rd, 2009, 05:45 AM

If it's Siemens S7-300, you have to convert INT to DINT, then DINT to REAL.

speedcat · March 23rd, 2009, 06:12 AM

I Made It On s7-200 U Have To Convert It From INT TO DINT Then To Real ,You Will Find This Instrctions In ''Convert'',Put In Your Mind To Display Number Eventually As A Floating Point Wherever You Display It Status Chart,Scada Software..etc

bernie_carlton · March 23rd, 2009, 09:18 AM

SS4884 - the MOV command moves the VALUE from the Source to the Destination. Thus with an INT Source and a REAL Destination you will perform the operation you requested.

JesperMP · March 23rd, 2009, 09:31 AM

Quote:

Originally Posted by bernie_carlton

SS4884 - the MOV command moves the VALUE from the Source to the Destination. Thus with an INT Source and a REAL Destination you will perform the operation you requested.

Sorry Bernie. But MOVE merely moves the content in a bitwise manner. There is no conversion.

In STL you write:
L "int_val"
ITD // convert to double-integer
DTR // Convert to real
T "real_val"

In LAD/FBD there are the blocks I_DI and DI_R.
Unfortunately they require that the result is stored in an intermediary address. So it is 'neater' in STL.

bernie_carlton · March 23rd, 2009, 09:38 AM

jesperMP - no, COPy is the bitwise mover that you are thinking of. MOV interprets the value of the source and creates that value (as close as possible) in the destination.

I may have not made this clear. based on SS4884's last post it appears he is trying to sent an INT to a REAL in ControlLogix. It is for that platform that I made my staatement.

bkottaras · March 23rd, 2009, 09:51 AM

Quote:

Originally Posted by bernie_carlton

SS4884 - the MOV command moves the VALUE from the Source to the Destination. Thus with an INT Source and a REAL Destination you will perform the operation you requested.

Bernie is right.
In CLX all you need to do is MOV the (integer value) which will be the SOURCe to a (real value) which will be the DESTINATION.
No additional conversion is needed, CLX does it automatically.

JesperMP · March 23rd, 2009, 09:56 AM

Quote:

Originally Posted by ss4884

I tried but i didnt find any in siemens we have some standard instruction to do so but i didnt find the same in control logix.

Reading this again, I am not certain if he used to work with CLX and is now working with S7, or it is is vice-versa. I just love it when someone post so ambigously.

OZEE · March 23rd, 2009, 10:49 AM

Quote:

Originally Posted by JesperMP

Reading this again, I am not certain if he used to work with CLX and is now working with S7, or it is is vice-versa. I just love it when someone post so ambigously.

That's the deal -- he hasn't told us!!

ss4884 · March 24th, 2009, 01:22 AM

Thanks bernie i tried as you suggested,It works

Kakka · March 24th, 2009, 05:05 AM

In siemens..there is no direct conversion methods..but you have STL commands like ITD - Integer to Double

and DTR - Double to Real

Quote:

Originally Posted by ss4884

Hi,
can anyone help me out by guiding me how to perform INT to REAL Conversion..Pls It urgent

bernie_carlton · March 24th, 2009, 06:55 AM

Quote:

Thanks bernie i tried as you suggested,It works

I guess that's an indirect answer to our 'which platform' question.

March 23rd, 2009, 04:47 AM	#1
ss4884 Member Join Date: Mar 2009 Location: Chennai Posts: 9	INT to Real Datatype Conversion Hi, can anyone help me out by guiding me how to perform INT to REAL Conversion..Pls It urgent

March 23rd, 2009, 09:18 AM	#7
bernie_carlton Lifetime Supporting Member + Moderator Join Date: Apr 2002 Location: Yakima, Washington Posts: 4,624	SS4884 - the MOV command moves the VALUE from the Source to the Destination. Thus with an INT Source and a REAL Destination you will perform the operation you requested. __________________ Controlling outputs is the PLC's way of getting its inputs to change. www.thePLCguy.com

March 23rd, 2009, 09:38 AM	#9
bernie_carlton Lifetime Supporting Member + Moderator Join Date: Apr 2002 Location: Yakima, Washington Posts: 4,624	jesperMP - no, COPy is the bitwise mover that you are thinking of. MOV interprets the value of the source and creates that value (as close as possible) in the destination. I may have not made this clear. based on SS4884's last post it appears he is trying to sent an INT to a REAL in ControlLogix. It is for that platform that I made my staatement. __________________ Controlling outputs is the PLC's way of getting its inputs to change. www.thePLCguy.com

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March 23rd, 2009, 05:05 AM	#3
ss4884 Member Join Date: Mar 2009 Location: Chennai Posts: 9	I tried but i didnt find any in siemens we have some standard instruction to do so but i didnt find the same in control logix. can you please help me out with some other suggestion

March 23rd, 2009, 05:08 AM	#4
OZEE Member Join Date: Mar 2006 Location: Kansas Posts: 1,670	What PLC? Every PLC does it differently... Have you just tried a copy from your int into the new real??

March 23rd, 2009, 05:45 AM	#5
L D[AR2,P#0.0] Supporting Member Join Date: Nov 2006 Location: UK Posts: 4,555	If it's Siemens S7-300, you have to convert INT to DINT, then DINT to REAL.

March 23rd, 2009, 06:12 AM	#6
speedcat Member Join Date: Mar 2009 Location: cairo Posts: 27	I Made It On s7-200 U Have To Convert It From INT TO DINT Then To Real ,You Will Find This Instrctions In ''Convert'',Put In Your Mind To Display Number Eventually As A Floating Point Wherever You Display It Status Chart,Scada Software..etc

March 24th, 2009, 01:22 AM	#13
ss4884 Member Join Date: Mar 2009 Location: Chennai Posts: 9	Thanks bernie i tried as you suggested,It works

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