Multiply And Divide Cj1

[mos89 0]

Hi all I have a question : i try to make some computation : LD 0.00 *UL(423) N1 N2 R2 *UL(423) R1 N3 R2 /UL (433) R2 N4 R3 my symbole declaration : N1 UDINT D200 0 N2 UDINT D202 0 N3 UDINT D204 0 N4 UDINT D206 0 N5 UDINT D208 0 R1 ULINT D300 0 R2 ULINT D304 0 R3 ULINT D308 0 R4 ULINT D312 0 R5 ULINT D316 0 my preset values N1=&635 N2=&635 N3=&314 N4=&4000000 R1=&403225 R2=&126612650 R3=&216068727985 R3 should be 31 or 32 what is wrong with my code ?

[benbrad 0]

Why is R2 used for results twice? Try changing the first line to read *UL(423) N1 N2 R1 then the answer is 31.6531625 or &31 in D308 Edited 8 Mar 2006 by benbrad

[Nibroc 4]

... Also be careful with long divide or multiply instructions, the results 'spill over' into 4 words. You will need to allocate your results words no less than 4 words apart. See Table: (also see CS/CJ instructions reference guide for further information) Nibroc

[lchamarthi 2]

I could get the result as 324EB324B1. So R3 is 32 in D308 If change R3 ULINT D308 to Hexa, one can able to see 32. Edited 9 Mar 2006 by lchamarthi