Omron NX Series User Manual

10 ms
15 ms
10 ms
100-ms interval
100-ms interval
Originator
Output data 1
Output data 2
Output data 1
Connection 2 heartbeat
Output data 2
Connection 1 heartbeat
Output data 1
Target
Node 2
Node 1
Requested Packet Interval (RPI) and Bandwidth Usage (PPS)
The number of packets transferred each second is called the used bandwidth, or PPS (packets per
second).
The PPS is calculated from the RPI and heartbeat for each connection as follows:
PPS for a connection (pps)
= (1,000/RPI (ms)) + (1,000/Heartbeat transmission period (ms))
Use the following equation to calculate the total number of packets transferred by each EtherNet/IP
port (Unit) in 1 second.
Total PPS for the EtherNet/IP port = T
otal PPS of originator connections + Total PPS of target connec-
tions (*)
* Connections set as target connections must be added, too.
The following shows the maximum number of packets that each EtherNet/IP port can send and re-
ceive per second through tag data links (i.e., the allowed communications bandwidth per Unit). You
need to consider these values when configuring connections.
• 40,000 pps
12 Communications Performance and Communications Load
12-3
NX-series EtherNet/IP Unit User's Manual (W627)
12-1 Communications System
12
12-1-1 Tag Data Link Communications Method

Omron NX Series Specifications

General

Programming Languages	Ladder, Structured Text, Function Block Diagram, Sequential Function Chart
Communication Ports	Ethernet, USB, RS-232C, RS-485
Memory Capacity	Varies by model
Program Memory	Varies by model
Data Memory	Varies by model
Operating Temperature	0°C to 55°C
Power Supply	24 VDC
Ethernet Ports	1 or 2 ports (depending on model)
USB Ports	1 or 2 ports (depending on model)
Dimensions	Varies by model
Weight	Varies by model