Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual page 556

Operation rules
The result of an operation is output as shown below depending on the combination of floating-point
data.
DOUBLE FLOATING-POINT ADD (+D)
Addend
0
Numeral
+
–
NaN
* *: The results could be zero (including underflows), a numeral, +o, or -o.
ER: The Error Flag will be turned ON and the instruction will not be executed.
DOUBLE FLOATING-POINT SUBTRACT (-D)
Subtrahend
0
Numeral
+
–
NaN
* *: The results could be zero (including underflows), a numeral, +o, or -o.
ER: The Error Flag will be turned ON and the instruction will not be executed.
DOUBLE FLOATING-POINT MULTIPLY ( D)
Multiplier
0
Numeral
+
–
NaN
* *: The results could be zero (including underflows), a numeral, +o, or -o.
ER: The Error Flag will be turned ON and the instruction will not be executed.
DOUBLE FLOATING-POINT DIVIDE (/D)
Divisor
0
Numeral
+
–
NaN
results will be zero for underflows.
* : The
* *: The results could be zero (including underflows), a numeral, +o, or -o.
ER: The Error Flag will be turned ON and the instruction will not be executed.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
0 Numeral
0 Numeral
Numeral **
+ +
– –
0 Numeral
0 Numeral
Numeral **
– –
+ +
0 Numeral
0 0
0 **
ER +/–
ER +/–
0 Numeral
ER +/–
0 **
0 *
0 *
Augend
+ –
+ –
+ –
+ ER
ER –
Minuend
+ –
+ –
+ –
ER –
+ ER
Multiplicand
+ –
ER ER
+/– +/–
+ –
– +
Dividend
+ –
+ –
+/– +/–
ER ER
ER ER
3. Instructions
NaN
ER
3
NaN
ER
NaN
ER
NaN
ER
519