Omron CJ1W-EIP21 Operation Manuals page 291

For nj-series cpu unit. cj-series ethernet/ip units
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Communications Performance
and Communications Load
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
12-1 Communications System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2
12-1-1
Tag Data Link Communications Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2
12-1-2
Calculating the Number of Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
12-1-3
Packet Interval (RPI) Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-5
12-2 Adjusting the Communications Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-6
12-2-1
Checking Bandwidth Usage for Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . 12-7
12-2-2
Tag Data Link Bandwidth Usage and RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-8
12-2-3
Adjusting Device Bandwidth Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-9
12-2-4
Changing the RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-10
12-2-5
RPI Setting Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
12-3 I/O Response Time in Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21
12-3-1
Timing of Data Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21
12-3-2
EtherNet/IP Unit Data Processing Time . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-22
12-3-3
Effect of Tag Data Links on Task Periods . . . . . . . . . . . . . . . . . . . . . . . . . . 12-24
12-3-4
Maximum Tag Data Link I/O Response Time . . . . . . . . . . . . . . . . . . . . . . . 12-25
12-4 Message Service Transmission Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-27
12
12-1

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