
2.CONFIGURING A SAFE SYSTEM OPERATION B-63404EN/03
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2.2 HANDLING MULTIPLE-BYTE DATA
With this DeviceNet function, data communications on the network
and updating of data assigned to PMC R area are performed
asynchronously. For this reason, handling of data of two bytes or
longer must be synchronized on the PMC (in the ladder program).
For example, when multiple-byte DI data is read from the master
device on a slave, signals for acquiring synchronization must be
provided before and after the data, DI data must be read when the
synchronizing signals set by the master device is correctly read by the
slave, and the slave must reset the synchronizing signals when it has
finished reading the DI data and then notify the master device that it
has finished reading the DI data.