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135
Message Service Delay Times
Section 8-4
2. The data send processing time for the area marked by the asterisk (*) in
the diagram will be affected by the processing capacity of the computer
that is used.
3. The communications cycle time may fluctuate.
4. Refer to the
Controller Link Units Operation Manual
(W309) for details on
the time required for data exchanges between the Controller Link Unit and
the PC.
8-4
Message Service Delay Times
The following diagram illustrates the maximum message service transmission
delay time. In this example, the MEMORY AREA READ FINS command is
sent to the PC at node #2 (a CS-series PC) by the user application at the
computer at node #1.
Maximum transmission delay time = Send processing (node #1) + Communi-
cations cycle time + Transmission delay time (for command) + Receive pro-
cessing (node #2) + PC processing time (node #2) + Send processing (node
#2) + Communications cycle time + Transmission delay time (for response) +
Receive processing (node #1)
Send/Receive Processing at Node #1
Depends on the processing capacity of the computer that is used.
Communications Cycle Time
See
Transmission Delay Time
Transmission delay time varies with the baud rate.
User application
Maximum transmission delay
(ClkSendFins)
(ClkRec
v
Fins)
Computer at
node #1
Recei
v
e processing at
node #1 (response)
Transmission delay
(response)
Communications cycle
Send processing at node
#2 (response)
PC at node #2
Transmission delay
(command)
Recei
v
e processing at
node #2 (command)
Send processing at node
#1 (command)
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
Summary of Contents for SYSMAC 3G8F7-CLK12-EV1
Page 2: ......
Page 4: ...iv ...
Page 20: ...xx Conformance to EC Directives 6 ...
Page 48: ...28 Applications Precautions Section 1 4 Example CX Programmer Response Timeout Setting ...
Page 68: ...48 Backup Power Supply Wiring Optical Ring Systems Only Section 2 4 ...
Page 74: ...54 Using the C Library Section 3 2 ...
Page 110: ...90 Changing the Data Link Tables with Active Data Links Section 5 5 ...
Page 187: ......