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Data Link I/O Response Time
Section 9-3
Minimum Data Link I/O Response Time
There are three points shown in the diagram above where processing is
delayed, increasing the data link I/O response time.
In this case, both the input ON response time and output ON response time
are considered negligible (0), but the data processing time required for data
exchange and the time required for the data transmission itself cannot be
ignored, so they are included in the total. The respective values are as follows:
Data processing time:
0.001
×
(8 + 16)
×
8 + 1.7 = 1.89
≅
1.9 ms
Data Link transmission time:
The following formula is derived from on the transmission speed.
0.008
×
Number of data link words (ms)
In this case, this gives the following result.
0.008
×
(8 + 16) = 0.19
≅
0.2 ms
Noise may increase I/O delays.
Cycle time of PLC at node #1
25 ms
Data processing time
1.9 ms
Data link transmission time
0.2 ms
Data processing time
1.9 ms
PLC cycle time at node #7
10 ms
Total (data link I/O response time)
39.0 ms
Input device
Program
Program
Input
Input ON response time
1 cycle
Output
Output device
Output ON response time
1 cycle
PLC at node #7
I/O refresh
Data exchange
PLC at node #1
Data link I/O response time
Data processing time
Data processing time
Data link transmission time
Summary of Contents for CS1W-CLK12-V1
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 11: ...xii ...
Page 59: ...42 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Page 62: ...45 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Page 91: ...74 CVM1 and CV series Optical Ring Controller Link Units Section 4 2 ...
Page 108: ...91 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 125: ...108 Checking Data Link Status Section 5 4 ...
Page 181: ...164 Setting Routing Tables Section 7 4 ...
Page 199: ...182 Memory Areas Related to Duplex Operation Section 8 6 ...
Page 275: ...258 Handling Precautions Section 10 7 ...
Page 298: ...281 CS series Optical Bus Controller Link Units Appendix C Dimensions Unit mm 101 35 130 ...
Page 299: ...282 CS series Optical Bus Controller Link Units Appendix C ...