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266
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 SEND command is sent.
RECV Instruction
Maximum Delay Time
The data flow which will yield the maximum transfer interval from the time the
RECV(193)/RECV(98) instruction is executed by the user program to the time
the Controller Link Unit stores the data in the local Unit’s memory area is
described below.
Note
Be sure to take into account the time required for data links and program exe-
cution, which are not included in the following example.
Max. transmission delay = Link servicing interval (source node) + Link service
processing (source node) + Transmission processing (command) + Communi-
cations cycle + Transmission delay (command) + Reception processing (com-
mand) + Link servicing interval (destination node) + Link service processing
(destination node) + Transmission processing (response) + Communications
cycle + Transmission delay (response) + Reception processing (response) +
Link servicing interval (source node) + Link service processing (source node).
Link servicing interval (source node)
PLC cycle time (source node)
Link service processing (source node)
1 ms
Transmission processing
0.00075
×
256 + 2 = 2.192
≅
2.2 ms
Communications cycle time (See note.)
600
×
4 + 110
×
32 + 320
×
0 + 4
×
0 + 2,290 = 8,210
µ
s
≅
8.2 ms
Transmission delay
0.008
×
256 + 0.112 = 2.16
≅
2.2 ms
Reception processing
0.00075
×
256 + 1.13 = 1.492
≅
1.5 ms
Link servicing interval (destination node)
As required by Programming
Device
Link service processing (destination node)
1 ms
Total (max. transmission delay)
PLC cycle time (source node) +
Peripheral servicing interval
(destination node) + 16.1 ms
RECV (193)/RECV(98)
executed
Data stored
Link service interval (source node)
Transmission processing (command)
Reception processing (response)
Communications cycle
Reception processing (command)
Link service interval (destination mode)
Transmission delay (command)
Link service processing (source node)
Transmission delay (response)
Transmission processing (response)
Link service processing (destination node)
Maximum transmission delay
Link service processing (source node)
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 ...