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 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 .
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 .
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