FX Series Programmable Controlers Applied Instructions 5
5-29
5.3 Arithmetic And Logical Operations -
Functions 20 to 29
Contents:
Page
ADD - Addition FNC 20 5-25
SUB - Subtraction FNC 21 5-26
MUL - Multiplication FNC 22 5-27
DIV - Division FNC 23 5-28
INC - Increment FNC 24 5-29
DEC - Decrement FNC 25 5-29
WAND - Word AND FNC 26 5-30
WOR - Word OR FNC 27 5-30
WXOR - Word Exclusive OR FNC 28 5-31
NEG - Negation FNC 29 5-31
Symbols list:
D - Destination device.
S - Source device.
m, n- Number of active devices, bits or an operational constant.
Additional numeric suffixes will be attached if there are more than one operand with the same
function e.g. D
1,S3 or for lists/tabled devices D3+0, S+9 etc.
MSB - Most Significant Bit, sometimes used to indicate the mathematical sign of a number, i.e.
positive = 0, and negative = 1.
LSB - Least Significant Bit.
Instruction modifications:
PPP - An instruction operating in 16 bit mode, where PPP identifies the instruction
mnemonic.
PPPP - A 16 bit mode instruction modified to use pulse (single) operation.
DPPP - An instruction modified to operate in 32 bit operation.
DPPPP - A 32 bit mode instruction modified to use pulse (single) operation.
( - A repetitive instruction which will change the destination value on every scan unless
modified by the pulse function.
) - An operand which cannot be indexed, i.e. The addition of V or Z is either invalid or will
have no effect to the value of the operand.
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