![background image](http://html.mh-extra.com/html/omron/c200hw-clk21/c200hw-clk21_operation-manual_742483286.webp)
261
Data Link I/O Response Time
Section 8-3
12,000 to 15,600 (approx.) words:
×
3
15,600 (approx.) to 20,000 words:
×
4
If there is a node with more than 3,850 send words, however, the factors
become
×
5 and
×
6.
Noise may increase I/O delays.
Minimum Data Link I/O Response Time
The minimum data link I/O response time (i.e., the time that will not delay any
processing) can be calculated as follows:
Both the input ON response time and output ON response time are consid-
ered 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) + 0.1 = 0.124
≅
0.1 ms
Data Link transmission time:
The following formula is derived from the transmission speed (2 Mbits/s).
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
Note
Noise may increase I/O delays.
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
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
0.1 ms
PLC cycle time at node #7
10 ms
Total (data link I/O response time)
37.2 ms
Содержание C200HW-CLK21
Страница 3: ...iv ...
Страница 9: ...x ...
Страница 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Страница 13: ...xiv ...
Страница 19: ...xx ...
Страница 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Страница 69: ...44 Message Service Procedure Section 2 2 ...
Страница 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Страница 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Страница 261: ...236 Response Codes Section 6 7 ...
Страница 297: ...272 Message Delay Times Section 8 4 ...
Страница 353: ...328 Handling Precautions Section 9 6 ...
Страница 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Страница 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Страница 369: ...344 Standard Models Appendix A ...
Страница 391: ...366 Using the Relay Terminal Block Appendix C ...
Страница 397: ...372 Index ...
Страница 401: ...376 Revision History ...