Omron CVM1-CLK21, Operation Manual

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209
Message Delay Times Section 8-4
Note Be sure to take into account the time required for data links and program exe-
cution, which are not included in the following example.
Max. transmission delay = Link Unit servicing interval (source node) + Link
service processing (source node) + Transmission proc Communica-
tions cycle time + Transmission delay + Reception proc Link Unit ser-
vicing interval (destination node) + Link service processing (destination node)
Link Servicing Interval (Source and Destination Nodes)
Link servicing depends on the execution mode of the PC. The execution
modes on the source and destination modes need not be the same.
For synchronous execution, links are serviced once per PC execution cycle.
For asynchronous execution, links are serviced according to the peripheral
servicing interval. Refer to the operation manual for the PC for details. Refer
to the CVM1 and CV-series PCs Operation Manual: Ladder Diagrams (W202)
or CS/CJ-series PCs Programming Manual (W340) for details.
Link Service Processing (Source and Destination Nodes)
Link service processing is the same as the PC’s peripheral servicing and is
approximately 1 ms for Controller Link Units.
Transmission Processing
Number of words transferred
×
0.00075 ms + 2 ms
Communications Cycle Time (with Data Links Inactive)
See 8-2 Communications Cycle Time (on page 195).
Transmission Delay Time
Transmission delay time varies with the baud rate.
Reception Processing
Number of words transferred
×
0.00075 + 1.3 ms
Note The I/O response time can increase due to noise or restrictions on the number
of frames that can be transmitted while data links are operating.
SEND(192)/SEND(90)
executed
Link Unit servicing (source node)
Transmission processing
Communications cycle
Data stored
Reception processing
Max. transmission delay
Link Service processing (source node)
Link Service processing
(destination node)
Transmission delay
Link Service
processing
(source node)
Baud rate Transmission delay time
2 Mbps Number of words transferred
×
0.008 + 0.112 ms
1 Mbps Number of words transferred
×
0.016 + 0.224 ms
500 Kbps Number of words transferred
×
0.032 + 0.448 ms