Packet Interval (Rpi) Accuracy - Omron CJ1W-EIP21 Operation Manuals

12-1-3 Packet Interval (RPI) Accuracy

The send processing delay occurs in the EtherNet/IP Unit when data packets are sent once each
packet interval (RPI). This delay varies with the RPI error shown in the following graph, so the send
processing delay time is the maximum value for each RPI.
Packet interval (RPI)
0.5 to 1,000 ms
1,000 to 10,000 ms
16
14
12
10
8
6
4
2
0
0 1000
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
12 Communications Performance and Communications Load
RPI error (±) (%)
15 − (RPI [ms]/100)
5% of the RPI
2000 3000 4000 5000
RPI [ms]
6000 7000 8000 9000 10000
12-5
12