Siemens SIMATIC S5-115U User Manual page 377

S5-115U Manual
11.1.2 Arithmetic Blocks
Use function blocks FB242 and FB243 to multiply and divide.
Multiplier : 16 -FB242-
Use function block FB242 to multiply one fixed-point binary number (16 bits) by another. The pro-
duct is represented by two fixed-point binary numbers (16 bits each). The result is also scanned for
zero. An eight-bit number must be transferred to a 16-bit word prior to multiplication.
Call and Parameter Assignments
Parameter Type
Type
Z1 I
Z2 I
Z3=0 Q
Z32 Q
Z31 Q
EWA 4NEB 811 6130-02b
Data Assignment
W - 32768 to+32767
W
- 32768 to+32767
Bi
"1", if the
product is zero
W
16 bits
W
16 bits
Meaning
Multiplier
Multiplicand
Name : MUL : 16
Z1
Scan for zero
Z2
Z3=0
Product,
high-order word
Z32
Z31
Product,
low-order word
Integral Blocks
STL
: JU FB 242
:
:
:
:
:
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