804
Basic I/O Unit Instructions Section 3-22
The actual timing for data link area refreshing in this example is as follows:
• When transmitting: Data is transmitted over the network the next time that
the token right is acquired. (The transmitted data is delayed up to 1 com-
munications cycle time max.)
• When receiving: The data that is input was received from the network the
last time that the token right was acquired. (The data received is delayed
up to 1 communications cycle time max.)
Examples of Data Transfer Processing:
• Transferring Data from the Previous I/O Refreshing
• Transferring Data with Execution of DLNK(226)
DLNK
&1
0.00
Controller Link
Refresh
Data link area
Controller Link Unit
with unit number 1
Data link
refreshing
Cycle time
Refreshing data link
data within PLC
Data transfer processing
Data link
One communications
cycle time
Cycle time
Refreshing data link
data within PLC
Data transfer processing
Data link
One communications
cycle time
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