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Chapter 5 Instruction Specifications
5-47
Item number Arithmetic instructions-2 Name Binary addition (BINARY ADDITION)
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
zzz
↕↕
45
Lower case: DW
Instruction format Number of steps
Condition Steps
d = s1 + s2 Word 4 61
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 Augend {{{{{{{{
s2 Addend
{{{{{{{{
Function
• Adds s1 and s2 as the binary data, and substitutes the result into d as the binary data.
• The C flag is set to “0” if the operation result is within the range of H0000 to HFFFF for word and H00000000 to
HFFFFFFFF for double word. Otherwise, It is set to “1.”
C = s1m x s2m + s1m x dm + s2m x dm
• The V flag is set to “1” if the operation result is meaningless as signed binary data, and “0” if it is meaningful.
s1 s2 d V
Positive Positive Positive 0
Positive Positive Negative 1
Positive Negative Positive/Negative 0
Negative Positive Negative/Positive 0
Negative Negative Positive 1
Negative Negative Negative 0
V = s1m x s2m x dm + s1m x s2m x dm
Notes
• The combinations of d, s1 and s2 are as follows:
ds1s2
Word Word Word
Double word Double word Double word
Program example
X00000 DIF0
WR0002= WR0000 + WR0001
LD X00000
AND DIF0
[
WR0002 = WR0000 + WR0001
]
Program description
• The sum of WR0000 and WR0001values is substituted into WR0002 at the leading edge of input X00000.
d = s1 + s2
s1
s2
d
0
0
0
s2m
dm
C
+
Most significant bit
s1m