Omron CS1W-NC113 Manual page 112

Transferring and Saving Data
CPU Unit
Caution
!
100
Example:
PCU
DM Area
Position #0
Position #1
Position #2
Position #3
• If an error is detected by the data check, the correct data should be sent again.
• If data transfer is completed successfully, the error is cleared.
• If the data is stored or the instruction to activate is executed without the correct
data being re-sent, the error will be cleared but the data after the error will not
be transmitted. In this situation, an abnormal operation may result.
The Intelligent I/O Write (IOWR) and Intelligent I/O Read (IORD) instructions
transfer all data indiscriminately at execution. For this reason, if the IOWR or
IORD instructions are executed consecutively within the same cycle, an error
occurring at data transfer execution may not be output to the operating memory
area, in the way shown below.
If each item of data is
Receive buffer
within the acceptable
(internal memory)
range, it is written to the
position data area.
Position #0
Position #1
Position #2
If there is one or
Position #3
more item that is
outside the
acceptable range,
all data is
annulled.
Error codes output
Section 5-1
Position data area
(internal memory)
Position #0
Position #1
Position #2
Position #3