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268
Message Delay Times
Section 8-4
Note
This communications cycle time is calculated assuming that there is no node
that transmits event frames before the RECV command is sent.
8-4-2
C200HX/HG/HE and CQM1H-series PLCs
SEND(90)
The following diagram indicates the data flow which will yield the maximum
delay time from the time SEND(90) is executed by the user program to the
time the Controller Link Unit stores the data in the destination Unit’s memory.
Max. transmission delay = Link Unit servicing interval (source node) + Trans-
mission proc Communications cycle time + Transmission delay +
Reception proc Link Unit servicing interval (destination node).
Link Unit servicing (source node)
×
2
PLC cycle time (source node)
×
2
Link service processing (source node)
×
2
1 ms
×
2 = 2 ms
Transmission processing (command)
2 ms
Communications cycle
×
2 (See note.)
(600
×
4 + 110
×
32 + 320
×
0 + 4
×
0 + 2,290)
×
2 = 8,210
µ
s
×
2
≅
16.4 ms
Transmission delay (command)
0.112
≅
0.1 ms
Reception processing (command)
1.3 ms
Link servicing interval (destination node)
As required by Programming
Device (destination node)
Link service processing (destination node)
1 ms
Transmission processing (response)
0.00075
×
256 + 2 = 2.192
≅
2.2 ms
Transmission delay (response)
0.008
×
256 + 0.112 = 2.16
≅
2.2 ms
Reception processing (response)
0.00075
×
256 + 2 = 2.192
≅
2.2 ms
Total (max. transmission delay)
PLC cycle time (source node)
×
2 + Peripheral servicing time
(destination node) + 29.4 ms
SEND(90)
executed
Link Unit servicing
(source node)
Transmission processing
Communications cycle
Data stored
Link Unit servicing (destination
node)
Transmission delay
Max. transmission delay
Reception processing
Содержание C200HW-CLK21
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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 ...