Rockwell Automation 1772-AF4,D17726.5.3 User Manual, AUX FUNCT PROM - Manual (Page 33)

Programming
Chapter 3
3Ć25
4. Enter values for operands 1 and 2.
You can enter these numbers from the keyboard of your industrial terminal or
through ladder diagram functions. Entry of operand 1 = 000400 and operand 2
- 000200 produces the result 000002.000000 (Figure 3.16).
Figure 3.16
AF4 Division 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)
11492
201
202
203
204
305
306
307
310
0
0 0 4
0 0 0
0 0 2
0 0 0
0 2 0
0 0 0
0 0 0
(0)
S
(0)
(0) (0) (1)
ER
(0)
ER = Illegal Operand (Divide by Zero)
Entry and Display of Input and Result Values
Figure 3.17 shows one method you can use to enter values for operands 1 and 2
and for displaying the results of an AF4 division. Although there are several
techniques for accomplishing this, we chose get instructions. The first rung
requests an AF4 division function. The top branch of the second rung shows
the two 6-digit operands while the lower branch shows the 12 digit quotient.