Omron SYSMAC CP Series Instruction & Reference Manual page 214

2 Instructions
Function
*
*(420) multiplies the signed binary values in Md and Mr and outputs the result to R, R+1.
×
*L
*L(421) multiplies the signed binary values in Md and Md+1 and Mr and Mr+1 and outputs the result to
R, R+1, R+2, and R+3.
×
R + 3 R + 2
Sample program
2-178
Md (Signed binary)
Mr (Signed binary)
(Signed binary)
R + 1 R
(Signed binary)
Md + 1 Md
(Signed binary)
Mr + 1 Mr
R + 1 R (Signed binary)
0.00
*
When CIO 0.00 is ON in the following example, D100 and
D110 will be multiplied as 4-digit signed hexadecimal
D100
values and the result will be output to D120 and D121.
D110
D120
0.00
*L
When CIO 0.00 is ON in the following example, D101,
D100, D111, and D110 will be multiplied as 8-digit signed
D100
hexadecimal values and the result will be output to D123,
D110
D122, D121 and D120.
D120
CP1E CPU Unit Instructions Reference Manual(W483)