Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 213

Programmable controllers

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Sequence Input Instructions

AND LD connects in series the logic block just before this instruction with

another logic block.

Logic block A

Logic block B

Serial connection between logic block A and logic block B.

The logic block consists of all the instructions from a LOAD or LOAD NOT

instruction until just before the next LOAD or LOAD NOT instruction on the

In the following diagram, the two logic blocks are indicated by dotted lines.

Studying this example shows that an ON execution condition will be produced

when either of the execution conditions in the left logic block is ON (i.e., when

either CIO 000000 or CIO 000001 is ON) and either of the execution condi-

tions in the right logic block is ON (i.e., when either CIO 000002 is ON or

CIO 000003 is OFF).

There are no flags affected by this instruction.

Three or more logic blocks can be connected in series using this instruction to

first connect two of the logic blocks and then to connect the next and subse-

quent ones in order. It is also possible to continue placing this instruction after

three or more logic blocks and connect them together in series.

When a logic block is connected by AND LOAD or OR LOAD instructions, the

total number of AND LOAD/OR LOAD instructions must match the total num-

ber of LOAD/LOAD NOT instructions minus 1. If they do not match, a program

error will occur.

Coding Example (1)

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