Merge two Word to one value.

[Nablar]

I am using a Modicon M340 PLC, with Unity Pro.

I have two words. These two Word is part of one value. I need to merge these two Words and convert them to a Real value.

How can I do this?

I know I can do it by assigning each word from the array to a memory location ex. %MW100 and %MW101 and then define a DWord at %MW100.
But i need to do this in a DFB, without the ability to specify a memory address.

Anny suggestions?

 

[gclshortt]

http://static.schneider-electric.us/docs/Automation%20Products/35006144.pdf

Look at page 481 under data types. This will give an example of converting to real.
In the example the integer variable i1 is converted into a real variable before being
added to the real variable r4.
LD i1
INT_TO_REAL
ADD r4
ST r3

In your application you need to convert to real both values and then multiply the larger by the factor you want and then add.

Hope this helps you out,
Regards,

 

[tragically1969]

I am using a Modicon M340 PLC, with Unity Pro.

I have two words. These two Word is part of one value. I need to merge these two Words and convert them to a Real value.

How can I do this?

I know I can do it by assigning each word from the array to a memory location ex. %MW100 and %MW101 and then define a DWord at %MW100.
But i need to do this in a DFB, without the ability to specify a memory address.

Anny suggestions?

I am unsure what do you mean by merge ?

Do you mean literally join i.e.

Word 1 = 1234, word 2 = 5678 result word = 12345678

Or add as in an arithmetic function i.e.

Word 1 = 1234, word 2 = 5678 result word = 6912

 

[V0N_hydro]

Sounds like you want the WORD_AS_REAL block.

 

[Nablar]

Sounds like you want the WORD_AS_REAL block.

Yes.

I found the WORD_AS_DINT, and it solved my problem.

Thank you all for your help