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Message Delay Times
Section 8-4
RECV(98) Instruction
Maximum Delay Time
The following indicates the data flow which will yield the maximum transfer
interval from the time the RECV(98) instruction is executed by the user pro-
gram to the time the Controller Link Unit stores the data in the local Unit’s
memory area.
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 Unit servicing interval (source node) + Trans-
mission processing (command) + Communications cycle + Transmission
delay (command) + Reception processing (command) + Link Unit servicing
interval (destination node) + Transmission processing (response) + Communi-
cations cycle + Transmission delay (response) + Reception processing
(response) + Link Unit servicing interval (source node).
Link Servicing Interval (Source and Destination Nodes)
Link service processing is the same as the PLC’s peripheral servicing and is
approximately 1 ms for Controller Link Units.
Transmission Processing
Commands: 2 ms
Responses: Number of words transferred
×
0.00125 ms + 3 ms
Communications Cycle Time (with Data Links Inactive)
See
Transmission Delay Time
Transmission delay time varies with the baud rate.
Note
Commands: Transmission delay time is calculated assuming that the number
of words to be transferred is zero.
Responses: Transmission delay time is calculated according to the number of
words to be transferred.
RECV(98) executed
Link Unit servicing
(source node)
Transmission processing
(command)
Communications cycle
Data stored
Link Unit servicing (destination
node)
Max. transmission delay
Transmission processing
(response)
Reception processing
(response)
Transmission delay
Reception processing
(command)
Transmission delay
Baud rate
Transmission delay time
2 Mbps
Number of words transferred
×
0.008 + 0.112 ms
1 Mbps
Number of words transferred
×
0.016 + 0.224 ms
500 Kbps
Number of words transferred
×
0.032 + 0.448 ms
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 ...