Program Execution - Omron SYSMAC C2000H Operation Manual

Program Execution

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Program Execution

When program execution is started, the CPU scans the program from top to
bottom, checking all conditions and executing all instructions accordingly as it
moves down the bus bar. It is important that instructions be placed in the
proper order so that, for example, the desired data is moved to a word before
that word is used as the operand for an instruction. Remember that an in-
struction line is completed to the terminal instruction at the right before exe-
cuting an instruction lines branching from the first instruction line to other ter-
minal instructions at the right.
Program execution is only one of the tasks carried out by the CPU as part of
the cycle time. Refer to Section 6 Program Execution Timing for details.
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