194
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
Содержание CS1W-CLK12-V1
Страница 3: ...iv ...
Страница 5: ...vi ...
Страница 9: ...x TABLE OF CONTENTS ...
Страница 11: ...xii ...
Страница 59: ...42 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Страница 62: ...45 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Страница 91: ...74 CVM1 and CV series Optical Ring Controller Link Units Section 4 2 ...
Страница 108: ...91 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Страница 125: ...108 Checking Data Link Status Section 5 4 ...
Страница 181: ...164 Setting Routing Tables Section 7 4 ...
Страница 199: ...182 Memory Areas Related to Duplex Operation Section 8 6 ...
Страница 275: ...258 Handling Precautions Section 10 7 ...
Страница 298: ...281 CS series Optical Bus Controller Link Units Appendix C Dimensions Unit mm 101 35 130 ...
Страница 299: ...282 CS series Optical Bus Controller Link Units Appendix C ...
Страница 311: ...Authorized Distributor Cat No W370 E1 03 Note Specifications subject to change without notice Printed in Japan ...
Страница 312: ...CS1W CLK12 V1 CVM1 CLK12 CS1W CLK52 V1 CVM1 CLK52 Optical Ring Controller Link Units Cat No W370 E1 03 OPERATION MANUAL ...