Local Variables?

[TURNER]

Hi Scott,
Possibly another problem with local variables, they seam to clear on M99, but this does not happen on the m/c.
Is this set on a parameter on the m/c?
%
O0001(NCPLOT CLEARING VARS ON M99)
G65P2A10.B20.
(NEXT LINE SHOULD MOVE TO X30.0 )
( BUT GOES TO X20.0 AS #1 HAS BEEN CLEARED )
G0X[#1+20.0]
M30
O0002
G21G55G17G0
T1M6
G40G0X0.Y0.
Z2.
X#1Y#2
M99
%
thanks
Turner.

[MetLHead]

Hi Turner,

It seems odd that your control *wouldn't* clear the local variables on M99. The reason that they are called "local" variables is because they are only valid for the sub that they are used in. Say for example your program O0001 used variable #3 as a loop counter. Let's also say that your program O0002 also used variable #3 for something. The idea is that program O0002 can use this variable *without* disturbing the value of #3 that program O0001 is using. So after the M99 in O0002, the value in #3 that program O0001 sees is the same is it was before the subprogram call, even if program O0002 also used #3.

What control are you seeing this on?

Thanks,
Scott

[TURNER]

Originally Posted by MetLHead Hi Turner, It seems odd that your control *wouldn't* clear the local variables on M99. The reason that they are called "local" variables is because they are only valid for the sub that they are used in. Say for example your program O0001 used variable #3 as a loop counter. Let's also say that your program O0002 also used variable #3 for something. The idea is that program O0002 can use this variable *without* disturbing the value of #3 that program O0001 is using. So after the M99 in O0002, the value in #3 that program O0001 sees is the same is it was before the subprogram call, even if program O0002 also used #3. What control are you seeing this on? Thanks, Scott

Sorry you are right, i was wrong. The control does not clear on M99, it was a new program i was writing and testing in NCPlot, we had previously been using common variables shared between subprogs, i was trying a new method using G65 and only passing the variables needed for certain changes. Ive not used local variables before and wasnt aware that they had levels for each prog. Never mind, Ive learned somthing new anyway.
Turner