Rockwell Automation 1772-AF4,D17726.5.3 User Manual, AUX FUNCT PROM - Manual (Page 59)

Programming
Chapter 3
3Ć51
Figure 3.51
General AF4 Cosine Function Word and Digit Format
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Digit 1
(MSD)
Digit 2
Bit No.
Data Address
m
Digit 2
Operand
Digit 5
Result Address
n
Result
D E
n + 1
E = Enable Bit (1 = Function in Progress)
S = Sign Bit (1 = Negative)
MSD = Most Significant Digit
LSD = Least Significant Digit
11517
Digit 3
(LSD)
Digit 3
Digit 1
(MSD)
Digit 4
Digit 6
(LSD)
D = Done Bit (1 = Function Complete)
S
S
3. Enter a data address and a result address.
If we enter a data address of 205 and a result address of 310, the AF4
establishes the data table format shown in Figure 3.52. The data address, word
205, is reserved for the three digits of the angle whose cosine we want. The
result address, word 310, is reserved for the most significant three digits of the
cosine; the least significant three digits are stored in the next higher address,
word 311.
Figure 3.52
AF4 Cosine Function Format After Address Entry
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Digit 1
(MSD)
Digit 2
Bit No.
Data Address
Digit 2
Operand
Digit 5
Result Address
Result
D E
E = Enable Bit (1 = Function in Progress)
S = Sign Bit (1 = Negative)
MSD = Most Significant Digit
LSD = Least Significant Digit
11518
Digit 3
(LSD)
Digit 3
Digit 1
(MSD)
Digit 4
Digit 6
(LSD)
D = Done Bit (1 = Function Complete)
S
S
205
310
311