S5-115F Manual Blocks
6.1.2 Arithmetic Blocks
Use function blocks FB 242 and FB 243 to multiply and divide.
Multiplier: 16 -FB 242-
Use function block FB 242 to multiply one fixed-point binary number (16 bits) by another. The
product is represented by two fixed-point binary numbers (16 bits). The result is also scanned for
zero. An eight-bit number must be changed to a 16-bit word before multiplication.
Call and Parameter Assignment
AssignmentData
Type
TypeParameter
Z1
Z2
Z3=0
I
I
Q
W
W
Bi
-32768 to +32767
-32768 to +32767
”1” if the product
is zero
Meaning
Multiplier
Multiplicand
Scan for
zero
STL
: JU FB 242
Name : MUL : 16
Z1 :
Z2 :
Z3=0 :
Z32 :
Z31 :
Z32 Q W
16 bits Product
high word
Z31 Q W
16 bits Product
low word
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Divider:16 -FB243-
Use function block FB 243 to divide one fixed-point binary number (16 bits) by another. The result
(quotient and remainder) is represented by two fixed-point binary numbers (16 bits each). The
divisor and the result are also scanned for zero. An eight-bit number must be changed to a 16-bit
word before division.
EWA 4NEB 811 6149-02
6-3
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