Simatic S7: DINT to INT conversion

[JumpyPLC]

What is the easiest way to make this conversion: DINT to INT?
I did not find a solution for this from the Simatic help file.

 

[jvdcande]

Use a move instruction to copy the DINT to the INT. If the DINT is in the range -32768 to +32767, this should do. If the DINT is outside this range, the operation is useless.

Kind regards,

 

[MikeDawkins]

if you need to go the other way (int to dint), use the I_DI function as the MOVE only does a bitwise copy. The I_DI will extend the bit 15 of the int into the high order word of the dint.

 

[Jeebs]

Quick and dirty:

L DW#16#FFFF
L Dint
<D
JC err
T Int
err: NOP 0 // set error bit here if you need any

Something like that should do the trick. (I hope) But just remember, when you transfer to say MW10, you should be carefull as the data in MW8 will be erased. (transferred 32 bits and such.....)

 

[PeterW]

But just remember, when you transfer to say MW10, you should be carefull as the data in MW8 will be erased. (transferred 32 bits and such.....)

Don't think so...