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Chapter 5 Instruction Specifications
5-48
Item number Arithmetic instructions-3 Name BCD addition (BCD ADDITION)
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
d = s1 B+ s2 DER ERR SD V C Upper case: W
↕
zzz
↕
115
Lower case: DW
Instruction format Number of steps
Condition Steps
d = s1 B+ s2 Word 4 177
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 BCD data, and stores the result in d as the BCD data.
• The C flag is set to “1” if there is a digit increase, and “0” if not.
• The DER flag is set to “1” if the operation result s1 and s2 are invalid as the BCD data. If so, operation is not performed
and the C flag retains the previous state without outputting to d. If the s1 and s2 are valid as the BCD data, the DER is set to
“0.”
• When s1, s2 are words: 0000 to 9999 (BCD)
• When s1, s2 are double words: 00000000 to 99999999 (BCD)
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
WR002= WR000 B + WR001
LD X00000
AND DIF0
[
WR002 = WR000 B+ WR001
]
Program description
• The sum of WR000 and WR001 values is substituted into WR002 as the BCD data at the leading edge of input X00000.
d = s1 B+ s2