Omron CS1W-MCH71 -, Operation Manual

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IOWR Instruction to Transfer Data
Section 5-2
Timing Chart in Executing
IOWR Instruction
(Address Specification) The following describes the timing and processing when IOWR instruction is
executed.
1,2,3... 1. At first, on the CPU Unit, check if specifications of IOWR instruction’s op-
erands are correct.
(Format check) If they are not correct, the ER Flag will turn ON to interrupt
the IOWR instruction.
2. And then, on the MC Unit, check if the data in operands is applicable for
processing in the MC Unit. (Data check)
If the data is applicable for processing, the = Flag will turn ON.
If the data is not applicable for processing, the = Flag will not turn ON and
the instruction will be interrupted.
Transfer should be completed by the rise of the = Flag.
Transferred data
IOWR instruction
Format check 1. Data check
and processing 2.
Multiple scans
Depending on the No. of
transferred data and words,
completion time changes.