Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 78)

Data Manipulation Instructions
Chapter 9
9Ć3
Editing a Get Instruction in a Partially Completed Rung
1.
Enter the next instruction.
2. Position the cursor over the Get instruction you want to change.
3. Press -[G]- or any other appropriate instruction type key.
4. Enter
5. Enter if appropriate.
Editing a Get or Put Instruction in a Completed Rung
1.
Position the cursor over the Get or Put instruction you want to change.
2. Press -[G]-, -(PUT)-, or any other appropriate instruction type key.
3. Enter
Important: Do not perform step 4 for a Put instruction.
4. Enter if appropriate.
There are three compare instructions:
equal to
less than
limit test
Equal To
Purpose: An equal to comparison is made with the Get and Equ instructions.
The get value is the changing variable and is compared to the reference value of
the Equ instruction for an equal to condition. When the get value equals the equ
value, the comparison is true and logic continuity is established. It determines
the rung condition. Compares only the lower 12 bits to the immediately
preceding get instruction.
120
03
030
YYY
010
02
G
035
100
=
Reference Value
When YYY = 100, GET/EQU comparison is true and 010/02 is energized.
If the rung condition becomes:
True - If there is equality.
False - If there is no equality.
Compare Instructions