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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
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...