Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 837

Basic I/O Unit Instructions
0.00
Data link area
804
Controller Link Unit
with unit number 1
DLNK
Refresh
&1
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
Cycle time
One communications
cycle time
• Transferring Data with Execution of DLNK(226)
Cycle time
One communications
cycle time
Data link
refreshing
Controller Link
Refreshing data link
data within PLC
Data transfer processing
Refreshing data link
data within PLC
Data transfer processing
Section 3-22
Data link
Data link