Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 - Page 976

936
Basic I/O Unit Instructions Section 3-23
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
000000
DLNK
&1
W001
W001
W000
W000
Equals Flag
Equals Flag
DLNK
&1
000000
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