Omron SYSMAC mini SP10 Operation Manual page 78

Advanced Programming
0408
0000
0001 0107
0001 0107
0000
70
Diagram A
Diagram B
There are a few exceptions to this rule, including the INTERLOCK CLEAR
and step instructions. Each of these instructions is used as the second of a
pair of instructions and is controlled by the execution condition of the first of
the pair. Conditions should not be placed on the instruction lines leading to
these instructions.
When drawing ladder diagrams, it is important to keep in mind the number of
instructions that will be required to input it. In diagram A, below, an OR LOAD
instruction will be required to combine the top and bottom instruction lines.
This can be avoided by redrawing as shown in diagram B so that no AND
LOAD or OR LOAD instructions are required. Refer to 3-7-6 AND LOAD and
OR LOAD for more details.
Diagram A
Diagram B
Instruction
Address Instruction
Instruction
000 LD
001 Instruction
Address Instruction
0107
000
001
002
003
004
Address Instruction
000
0107
001
002
003
Section 3-6
Operands
0408
Operands
LD 0000
LD 0001
AND 0107
OR LD
OUT 0107
Operands
LD 0001
AND 0107
OR 0000
OUT 0107
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