Omron C200H Operation Manual page 70

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Basic Ladder Diagrams

last two blocks and working backward. The OR LOAD at program address

00008 combines blocks blocks d and e, the following AND LOAD combines

the resulting execution condition with that of block c, etc.

Again, this diagram can be redrawn as follows to simplify program structure

and coding and to save memory space.

The next and final example may at first appear very complicated but can be

coded using only two logic block instructions. The diagram appears as fol-

The first logic block instruction is used to combine the execution conditions

resulting from blocks a and b, and the second one is to combine the execu-

Address Instruction

Blocks d and e

Block c with result of above

Block b with result of above

Block a with result of above

Address Instruction

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