Omron NJ501-1300 - Page 297

13-1
NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
13
13-1 Communications System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
13-1-1 Tag Data Link Communications Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
13-1-2 Calculating the Number of Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
13-1-3 Packet Interval (RPI) Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-5
13-2 Adjusting the Communications Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-6
13-2-1 Checking Bandwidth Usage for Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . 13-7
13-2-2 Tag Data Link Bandwidth Usage and RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-8
13-2-3 Adjusting Device Bandwidth Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-9
13-2-4 Changing the RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-10
13-2-5 RPI Setting Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-16
13-3 I/O Response Time in Tag Data Links . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-21
13-3-1 Timing of Data Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-21
13-3-2 Built-in EtherNet/IP Port Data Processing Time . . . . . . . . . . . . . . . . . . . . . 13-21
13-3-3 Relationship between Task Periods and Packet Intervals (RPIs) . . . . . . . . 13-23
13-3-4 Maximum Tag Data Link I/O Response Time . . . . . . . . . . . . . . . . . . . . . . . 13-25
13-4 Message Service Transmission Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-27
Communications Performance
and Communications Load