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I/O Response Time in Tag Data Links
Section 10-3
Minimum Tag Data Link I/O Response Time
The minimum tag data link I/O response time, which occurs when there are no
processing delays, is calculated as follows.
When the baud rate is 100 Mbps, the transmission time can be calculated with
the following equation. If a network delay does not occur, just this transmis-
sion time is added.
Transmission time =
(Number of send data words
×
2 + 74)
×
8
×
0.00001 ms
Note
The I/O response time may be longer due to noise, or other events.
Output
: I/O processing
: Data exchange
Tag data link I/O response time
(1) Input ON
response
time
(2) Network transmission delay time
(3) Output ON
response time
Input
Calcu-
lation
Calcu-
lation
PLC #1 processing
Tag data link refresh cycle
PLC #2 processing
Input device
Transmission
path
Output
device
PLC #1
PLC #2
(1) Node 1
(PLC #1) input ON response time
Input switch delay time
1.5 ms
CPU Unit cycle time of PLC #1
10.0 ms
(2) Transmission time (722 send data words)
0.121 msec
(3) Node 2
(PLC #1) output ON response time
CPU Unit cycle time of PLC #2
15.0 ms
Output relay delay time
2.0 ms
Total (tag data link I/O response time)
28.6 ms
Summary of Contents for CJ2H-CPU6 - REV 02-2010
Page 2: ......
Page 4: ...iv...
Page 6: ...vi...
Page 14: ...xiv...
Page 18: ...xviii...
Page 38: ...12 Network Configurator Overview Section 1 5...
Page 58: ...32 Selecting the Network Devices Section 2 3...
Page 116: ...90 Auxiliary Area Data Section 4 5...
Page 222: ...196 Message Communications Errors Section 7 6...
Page 364: ...338 Using the Backup Tool Section 13 3...
Page 402: ...376 CS CJ series Ethernet Unit Function Comparison Appendix A...
Page 404: ...378 Ethernet Network Parameters Appendix B...
Page 406: ...380 TCP Status Transitions Appendix C...
Page 452: ...426 Precautions for Using Windows XP Vista or Windows 7 Appendix G...
Page 460: ...434 Index...
Page 462: ...436 Revision History...
Page 463: ......