Omron SYSMAC CV Series Operation Manual page 97

Ladder diagrams

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The following type of diagram can be coded easily if each block is coded in order:

first top to bottom and then left to right. In the following diagram, blocks a and b

would be combined using AND LOAD as shown above, and then block c would

be coded and a second AND LOAD would be used to combined it with the execu-

tion condition from the first AND LOAD. Then block d would be coded, a third

AND LOAD would be used to combine the execution condition from block d with

the execution condition from the second AND LOAD, and so on through to

The following diagram requires an OR LOAD followed by an AND LOAD to code

the top of the three blocks, and then two more OR LOADs to complete the mne-

Although the program will execute as written, this diagram could be drawn as

shown below to eliminate the need for the first OR LOAD and the AND LOAD,

simplifying the program and saving memory space.

Address Instruction

Address Instruction Operands

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