EAF Math Instructions
Chapter 14
14-2
Figure 14.1
EAF Two Operand Word and Digit Format in the Data Table
17 16 15 14
10 7
4 3
Data
0
S
Digit 1
Digit 2
Digit 3
Digit 4
Digit 7
Digit 10
Digit 5
Digit 8
Digit 11
Digit 6
Digit 9
Digit 12
Operand A
MSD
LSD
a
a+1
a+2
a+3
S
Digit 1
Digit 2
Digit 3
Digit 4
Digit 7
Digit 10
Digit 5
Digit 8
Digit 11
Digit 6
Digit 9
Digit 12
Operand B
MSD
LSD
b
d
g
k
Result
Address
Result
m
m+1
m+2
m+3
10348-I
13
X S
0 O/U
Address
The Operands and the Result words have the format xxx xxx . xxx xxx.
Only the Addition and Subtraction EAFs use all 12 digits. All other EAFs
use 6 digits maximum, located anywhere within the 12 available digits.
Legal formats are:
123456.
12.3456
12345.6 1.23456
1234.56
.123456
123.456
Enter the operands from the keyboard of your 1770-T3 terminal or through
ladder diagram instructions.
Operand A (which is the data address of the EAF instruction) can be
placed in any legal address in the data table. However, you must select
four consecutive addresses.
Important: Operand A does not need to be shown in the EAF rung.
