GE 9030 Data types

cjh · Mar 18, 2005

I'm working on a GE 9030 CPU374. I've been using the WORD data type quite frequently and then I noticed that there is also a UINT data type.
They both appear to be an unsigned 16 bit integer data type.
Does anyone know the difference between the two?

davidg68124 · Mar 18, 2005

If I remember correctly, it is the range of values that can be used.

Check the manual. I do not have a link to it right now.

David

RussB · Mar 18, 2005

Davids memory is pretty good.
In the world of IEC compliant software such as GE Fanuc's.
INT = is 16 bits +/- 32767
UINT = is 16 bit 0 - 65534
Word = is 16 bit, you can interprit the bit pattern as whatever, so it could be either.

cjh · Mar 18, 2005

Word = is 16 bit, you can interprit the bit pattern as whatever, so it could be either.

That was my thought at first also.

But... If you use a MOVE WORD function, it does not allow negative values like a MOVE INT function does.

Hmm... still a little perplexed at that one. But no big deal I guess. Acts like a UINT to me.

RussB · Mar 21, 2005

What is confusing is that how you view it may be different to how you use it. If the LSB is 1 the value is negative when used as INT (signed integer) but you could view it as UINT (unsigned integer) or DINT (double integer)

GE 9030 Data types

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