Rockwell Automation 1772-AF4,D17726.5.3 User Manual, AUX FUNCT PROM - Manual (Page 58)

Programming
Chapter 3
3Ć50
Entry and Display of Input and Result Values
Figure 3.50 shows one method for inserting the input angle and displaying the
input and the result of an AF4 sine function. Although there are several
techniques for accomplishing this, we chose get instructions. The first rung
requests the AF4 sine function. The top branch of the second rung shows the
angle value 080o in word 205. The lower branch shows the resultant sine 080
0
= 0.98480 in words 310 and 311 with an implied decimal point after the first
digit.
Figure 3.50
AF4 Sine Function Input and Result Display Rungs
G
310
G
311
480
G
205
080
098
Bit
Storage
Execute Aux
Function
Function Number:
Data Addr:
Result Addr: 310 35
205
AF4 Trigonometric Function, Cos xxx.
The AF4 cosine function finds the cosine of a 3-digit BCD angle. The input
angle is in degrees. The AF4 presents the result as a 6-digit value with an
implied decimal point after the most significant digit.
cos xxx. = +X.XX XXX
How to Enter an AF4 Cosine Function
To program an AF4 cosine function perform the following steps:
1. Press [SHIFT][EAF] or [SHIFT][SCT] on the keyboard of your industrial
terminal. Figure 3.1 appears on the CRT.
2. Enter 36, the function number for the AF4 cosine function.
This entry identifies that the function entered is to perform an AF4 cosine
calculation and that the processor use the data table format shown in
Figure 3.51 when executed. The three BCD digits in the operand labeled digit 1
through 3 represent the angle with an implied decimal point after the third digit.
The 6-digits in the result are the cosine of the angle with an implied decimal
point after the first digit.