Mitsubishi Code help still needed

[escoplcguy]

Hey guys,

I am starting to sort of understand what is going on in the mitsubishi world of programming, but i am still at a loss when it comes to these math instructions. I have an example and i really hope someone can help me fully understnad this, cause its all i really have left to this program puzzle i was left with...

i have a rung that says..


M8000
---| |----[DEMUL D957 D971 D248]
__________________5.0 185.0 27.942


This makes no sense to me because if you do the acutal math 27.942 is obviously not that answer.

Further details:

D957 gets its value, i think, from this instruction

[FLT D235 D957]
________5 5.00

But then further down the program there is this

[DEDIV D244 E600 D957]
_________90.624 5.00
Then Further down i have

[DEDIV D248 E28.32 D957]
__________27.942 5.00
Then of course theres

[DEMUL D954 E600 D957]
__________833.30 5.00



Problems like this are all through out this program and it doesnt make any sense to me... also how can a value be in a register when there are multiple values being either moved or multiplied to that register.... I'm so confused...

 

[BTalbot]

Lots of things to look for, remember M8000 is the run contact so wherever this is used it will do the math, move or whatever if there is no other logic between it and the instructions. Also doing D(E)Mul or D(E)Div results in the answer being stored in 4 consecutive registers D248(249,250, & 251)

 

[iant]

not certain why the value is different
but this might help

 

[iant]

M8000 is 'Always On' but what else is in the rung.
D248 is a result value that may be from another part of the program
do a search for D248