Siemens SIMATIC S5-95F Manual page 269

S5-95F
9.2.3 Multiplier : 16
Use function block FB 242 to multiply one fixed-point binary number (16 bits) by another
The product is represented by a fixed-point binary number (32 bits)
The result is also scanned for zero. An eight-bit number must be transferred to a 16-bit word prior to
multiplication.
Table 9-8. Calling and Parameter Assignments of FB242
Parameter
Z1
Z2
Z3=0
Z32
Z31
9.2.4 Divider : 16
Use function block FB 243 to divide one fixed-point binary number (16 bits) by another
(quotient and remainder) is represented by two fixed-point binary numbers (16 bits each).
The divisor and the result are also scanned for zero
16-bit word prior to division.
Table 9-9. Calling and Parameter Assignments of FB243
Parameter
Z1
Z2
OV
FEH
Z3=0
Z4=0
Z3
Z4
EWA 4NEB 812 6210-02
- FB242 -
Meaning Type
Multiplier
Multiplicand
Scan for zero
Product high-word
Product low-word
- FB243 -
Meaning Type
Dividend
Divisor
Overflow bit
Scan for zero
Scan for zero
Quotient
Remainder
Assignment
I W - 32768 to+32767
I W - 32768 to+32767
Q BI "1" if the product is zero
Q W 16 bits
Q W 16 bits
.
An eight-bit number must be transferred to a
Assignment
I W - 32768 to+32767
I W - 32768 to+32767
Q BI "1" if overflow
Q BI "1" for division by zero
Q BI "1" : quotient is zero
Q BI "1" : remainder is zero
Q W 16 bits
Q W 16 bits
Blocks and Their Functions
.
.
STL
: JU FB 242
NAME : MUL:16
Z1 :
Z2 :
Z3=0 :
Z32 :
Z31 :
STL
: JU FB 243
NAME : DIV:16
Z1 :
Z2 :
OV :
FEH :
Z3=0 :
Z4=0 :
Z3 :
Z4 :
.
The result
9-15