January 2012 8.15 Command Set 1691
8.15.25 SUBTRACTION (–)
Syntax: – (MINUS)
Operands: B, W, D, K
Action:
The control extends the operand to the width of the accumulator (32 bits) and
then subtracts the content of the operand from the content of the word
accumulator. The result of the operation is stored in the word accumulator
where you can process it further.
Example:
Subtract the number saved in word W6 from the constant, and then assign the
result to double word D8.
Initial state:
Constant = 10 000 (dec)
Word W6 = 200 (dec)
Double word D8 = ?
Function STL Accumulator
content
Operand content
Load the constant into the
word accumulator.
L
K10000
10000
Subtract word W6 from
the content of the word
accumulator.
– W6 9800 9800
Assign the result to
double word D8.
= D8 9800 9800
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