Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 92)

Math Instructions
Chapter 10
10Ć4
6. Enter <data> if appropriate.
7. Close the rung by pressing the appropriate math instruction key
(Table 10.B).
Table 10.B
Three Digit Math Functions
Addition Ć( + )Ć
Subtraction Ć( Ć )Ć
Multiplication Ć( x )Ć
Division Ć( ÷ )Ć
8. Enter <address(es)>.
Editing a Completed Rung
You edit a three digit math operation to change an address or the instruction
type by performing the following steps.
1. See chapter 9 and follow the editing procedure for a Get instruction.
2. Position the cursor over the math function.
3. Press the appropriate instruction type key.
4. Enter <address(es)>.
The processor can perform four math operations involving two operands:
Addition A + B = C
Subtraction A - B = C
Multiplication A x B = C
Division A
÷
B = C
The processor can perform three additional operations that involve only one
operand, the equations are:
A = C Square Root
Conversion
(BCD to Binary) E (BCD) = F (Binary)
Conversion
(Binary to BCD) F (Binary) = E (BCD)
You solve these equations with expanded math operations using the EAF
function of your processor. Figure 10.1 shows operand and result locations in a
ladder diagram rung.
Expanded Math