LS Industrial Systems XBC-DN10E, Руководство пользователя

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Chapter 6 Instruction Details
XBC E-Type Main Unit 6-163 Ver. 1
6.28.3 MUL, MULP, DMUL, DMULP
Instruction
Area Available
Step
Flag
P M K F L T C S Z D.x R.x
Co
nst.
U N D R
Error
(F110)
Zero
(F111)
Carry
(F112)
MUL(P)
DMUL(P)
S1 O O O O O O O - O - - O O O O O
4~6 - - - S2 O O O O O O O - O - - O O O O O
D O O O - O O O - O - - O O O O
Operand Description Data Type
S1 Data to be multiplied by S2 INT/DINT
S2 Data to be multiplied by S1 INT/DINT
D Address to save operation result in DINT/LINT
1) MUL (Signed Binary Multiply)
(1) Saves the result of word data S1 multiplied by S2 in D+1,D (32-bit).
(2) At this moment, it performs Signed Operation.
x
1234
b15 b0
S1
2345
b15 b0
S2
2893730
b31 b16 b15 b0
D + 1 D
2) DMUL (Signed Binary Double Multiply)
(1) Saves the result of word data (S1+1,S1) multiplied by (S2+1,S2) in D+3,D+2,D+1,D(32-bit).
(2) If operation result is over 2,147,483,648 (h7FFFFFFF) or below -2,147,483,647(hFFFFFFFF), Carry
Flag will be set.
3) Program Example
(1) For P1000=’100 and P1100=’20’, Input Signal P00000 is changed from Off to On status, the result of
multiplied ‘2000’ is saved in P1200~P1201.
MUL P1000 P1100 P1200
P00000
MUL,DMUL
P S1 S2 MULP, DMULP
S1 S2
means
MUL/DMUL
D
D