STRING_TO_INT function block behavior on M580 and Quantum

Product:

Control Expert

M580

Quantum

Question:

Why does the STING_TO_INT block has a different behavior when the string on the input has letters in it. Quantum will convert letters to numbers, but the M580 will just ignore the letters.

Answer:

Engineering told us that the way the M580 handles the block is the way it was always supposed to be handled, meaning that only digit should be presented to the input string of the block.

The reason they are saying this is because if you look at system %S18

Having a character that is not a number will trigger an arithmetic error as can be seen below in the M580

- With only number, no error

- With a letter, it triggers the error

Let's check with a Quantum CPU

So we see that the Quantum also reports an arithmetic error, even if it does some type of conversion.

Basically engineering says that the block is "fixed" and behaves correctly on the M580 and that it never did on the Quantum.

Publikováno pro: Schneider Electric Česká republika