196
Message Delay Times
Section 9-4
Note Noise may increase I/O delays.
Minimum Data Link I/O Response Time
In this case, both the input ON response time and output ON response time
are considered 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)
×
8 + 1.7 = 1.89
≅
1.9 ms
Data Link transmission time:
The following formula is derived based on the transmission speed.
0.008
×
(8 + 16) = 0.19
≅
0.2 ms
Assume that the sum of the instruction execution time and I/O refresh time for
the PLCs at nodes #1 and #7 is 1 ms. The equation for minimum data link I/O
response time is as follows:
Noise may increase I/O delays.
9-4
Message Delay Times
The two charts which follow indicate the sequence of processing which will
enable users to calculate the maximum delay time to be expected between
the time SEND(192/90) or RECV(193/98) is executed and the time the data is
stored in the remote or local node’s memory area, ready for use by other
instructions in the program.
9-4-1
CS-series, CVM1, and CV-series PLCs
SEND
The following diagram indicates the data flow which will yield the maximum
delay time from the time SEND(192)/SEND(90) is executed by the user pro-
gram to the time the Controller Link Unit stores the data in the remote Unit’s
memory.
Instruction execution time + I/O refresh time for PLC at node #1
1 ms
Data processing time
1.9 ms
Data link transmission time
0.2 ms
Data processing time
1.9 ms
Instruction execution time + I/O refresh time for PLC at node #7
1 ms
Total (data link I/O response time)
6.0 ms
Input
Input device
Input ON delay
1 cycle
I/O refresh
PLC at node #1
PLC at node #7
Peripheral servicing interval
Peripheral servicing interval
Output device
Output
ON delay
Data link I/O response time
Program
◆
Data link transmission
Data processing time
Data processing time
◆
Program
Содержание CS1W-CLK12-V1
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Страница 59: ...42 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Страница 62: ...45 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Страница 91: ...74 CVM1 and CV series Optical Ring Controller Link Units Section 4 2 ...
Страница 108: ...91 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Страница 125: ...108 Checking Data Link Status Section 5 4 ...
Страница 181: ...164 Setting Routing Tables Section 7 4 ...
Страница 199: ...182 Memory Areas Related to Duplex Operation Section 8 6 ...
Страница 275: ...258 Handling Precautions Section 10 7 ...
Страница 298: ...281 CS series Optical Bus Controller Link Units Appendix C Dimensions Unit mm 101 35 130 ...
Страница 299: ...282 CS series Optical Bus Controller Link Units Appendix C ...
Страница 311: ...Authorized Distributor Cat No W370 E1 03 Note Specifications subject to change without notice Printed in Japan ...
Страница 312: ...CS1W CLK12 V1 CVM1 CLK12 CS1W CLK52 V1 CVM1 CLK52 Optical Ring Controller Link Units Cat No W370 E1 03 OPERATION MANUAL ...