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Chapter 5 Instruction Specifications
5-51
Item number Arithmetic instructions-6 Name Binary multiplication (BINARY MULTIPLICATION)
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
d = s1 × s2
DER ERR SD V C Upper case: W
↕
zzzz 43
Lower case: DW
Instruction format Number of steps
Condition Steps
d = s1 × s2
Word 4 112
Double word 6
Bit Word Double word
Usable I/O
XY
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM
Constant
Other
d Substitution destination {{{ {{
s1 Multiplicand {{{{{{{{
s2 Multiplier {{{{{{{{
Function
• Multiplies s1 and s2 as the binary data, and substitutes the result into d+1 (upper digit) and d (lower digit) in binary.
• The DER flag is set to “1” if d+1 exceeds the usable I/O range (in this case only the lower word is substituted), and “0”
when it does not exceed.
MSB 0
MSB 0
d
0
MSB
d+1
×
WR0010
WR0011
WR0012WR0013
×
Example: WR0012 = WR0010
×
WR0011
DR0012
WR0011
×
DR0010
WR0010
WR0013
DR0012
WR0012
WR0015
DR0014
WR0014WR0017
DR0016
WR0016
s2
s1
Example: WR0014 = DR0010
×
DR0012
Notes
• The combinations of d, s1 and s2 are as follows:
ds1s2
Word Word Word
Double word Double word Double word
• Since the operation results are always substituted into d and d + 1, note that the word or double-word at d + 1 is not used as
the I/O of others.
Program example
X00000
WR0002 = WR0000 * WR0001
LD X00000
[
WR0002 = WR0000 * WR0001
]
Program description
• When input X00000 is on, the product of WR0000 value and WR0001 value is substituted into WR0002.
d = s1 x s2