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LDmicro Forum - Arithmetic Instructions Help? |
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Arithmetic Instructions Help? (by Mohamed Osama)
Hi every one
I want to know how to use arithmetic instructions? I wrote the following program: || XStart {ADD R :=} || ||-------] [------------------{ 5 + 6 }-----------|| || || || || || || ||------[END]----------------------------------------|| And in the simulation when I turn on start R should be 11 but nothing happens and R value doesn't change !!!
(no subject) (by Jonathan Westhues)
All variables starting with X (input), Y (output), A (analog input), T (timer), and R (internal relay) are special. Though I should fix how that gets displayed, since it's confusing.
(no subject) (by Mohamed Osama)
So there is a problem with arithmetic instructions that will be fixed in a later version of the program ??
(no subject) (by Samukelo Shezi)
If I understand Jonathan correctly, he's basically saying he will find a way to rephrase the manner it's entered, since the presence manner, though correctly functional, but is confusing to some of us.(He will just restructure it a bit)
(no subject) (by Mohamed Osama)
I don't know what is different from the above program but this program works:
|| XStart {ADD r :=} || ||-------] [------------------{ 5 + 4 }-----------|| can any one explain??
(no subject) (by Jonathan Westhues)
Do not start a variable name with R, X, Y, T, or A, unless it is an internal relay, input, output, timer, or analog input respectively.
LDmicro should have warned you about that (and probably will in a later version), but the code shouldn't have worked.
(no subject) (by Mohamed Osama)
I don't know but the variable name is "r" and the code works 100%
(no subject) (by Mohamed Osama)
I got it ..
When the variable name is capital r (R) the program doesn't work. When it is small r (r) the program works. Anyway I hope there will be no restrictions in variable name in future versions
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