Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 108)

Function Block Library 4–46
1336 FORCE — 5.9 August 1995
SCALE
BLOCK TYPE 20 decimal 14 hexadecimal
Scale
ID = Exec =
Out MSW
NODE 0 Input
NODE 1 Mult
NODE 2 Div
NODE 4
Out LSW NODE 3
DEFINITION
Multiplies the input Input by Mult and divides by Div. The result is a
two word output consisting of a least significant word Out LSW, and
a most significant signed integer Out MSW. If the result is a value
between 0 and 65535, Out LSW contains the value and Out MSW is
0. For values less than 0 the sign bit that indicates the negative value
is bit 15 of Out MSW. When Div is equal to 0, the result of the scale
block is 0.
INPUTS
Input — A signed integer between
±
32767.
Mult — A signed integer between
±
32767.
Div — A signed integer between
±
32767.
OUTPUTS
Out LSW — A least significant result word value representing bits
0–15 of a 32 bit output value.
Out MSW — A most significant result word value representing bits
16–31 of a 32 bit output value.
FUNCTION
Out LSW, Out MSW = (Input
×
Mult)
÷
Div.
PARAMETERS DATA TYPE LINKABLE DEFAULT VALUE RANGE
Input Signed Integer Yes 0
±
32767
Mult Signed Integer Yes 0
±
32767
Div Signed Integer Yes 1
±
32767
Out LSW Unsigned Integer No — 0 to 65535
Out MSW Signed Integer No —
±
32767
DOUBLE WORD VALUES
Both the Most Significant Word and the Least Significant Word are
interpreted together by the function algorithm as one word when
using 32 bit values. The range of a double word value is
±
2,147,483,647. The range of the more common, signed single-word
16 bit node is
±
32767.
31 16 15 0
Most Significant Word Least Significant Word
Node 4 Node 3