Rockwell Automation 1772-AF4,D17726.5.3 User Manual, AUX FUNCT PROM - Manual (Page 29)

Programming
Chapter 3
3Ć21
4. Enter values for operands 1 and 2.
You can enter these values from the keyboard of your industrial terminal or
through ladder diagram functions. Entry of operand 1 - 000400 and operand 2 -
000200 produces the result 00000080000 (Figure 3.12).
Figure 3.12
AF4 Multiplication Function Format After Execution
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
S
0 0
Bit No.
Data Address
Operand 1
Operand 2
S
Result Address
Result
D E
E = Enable Bit (1 = Function in Progress)
S = Sign Bit (1= Negative)
D = Done Bit (1 = Function Complete)
11489
201
202
203
204
305
306
307
310
0
0 0 4
0 0 0
0 0 2
0 0 0
0 0 0
8 0 0
0 0 0
(0)
S
(0)
(0) (0) (1)
Entry and Display of Input and Result Values
Figure 3.13 shows one method you can use to enter values for operands 1 and 2
and for displaying the results of an AF4 multiplication. Although there are
several techniques for accomplishing this, we chose get instructions. The first
rung requests an AF4 multiplication. The top branch of the second rung shows
the two 6-digit operands while the lower branch shows the 12 digit product.