Omron NJ501-1300 - Page 17

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NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
CONTENTS
Section 11 Automatic Clock Adjustment
11-1 Automatic Clock Adjustment................................................................................................ 11-2
11-1-1 Overview................................................................................................................................... 11-2
11-1-2 Specifications............................................................................................................................ 11-3
11-2 Procedure to Use the Automatic Clock Adjustment Function .......................................... 11-4
11-2-1 Procedure ................................................................................................................................. 11-4
11-2-2 Settings Required for Automatic Clock Adjustment .................................................................. 11-4
11-2-3 NTP Display.............................................................................................................................. 11-5
11-3 Troubleshooting Automatic Clock Adjustment................................................................... 11-7
Section 12 SNMP Agent
12-1 SNMP Agent........................................................................................................................... 12-2
12-1-1 Overview................................................................................................................................... 12-2
12-1-2 Specifications............................................................................................................................ 12-3
12-1-3 SNMP Messages...................................................................................................................... 12-3
12-1-4 MIB Specifications .................................................................................................................... 12-4
12-2 Procedure to Use the SNMP Agent.................................................................................... 12-20
12-2-1 Procedures ............................................................................................................................. 12-20
12-2-2 Settings Required for the SNMP Agent .................................................................................. 12-20
12-2-3 SNMP Settings Display........................................................................................................... 12-22
12-2-4 SNMP Trap Settings Display................................................................................................... 12-24
12-3 Troubleshooting SNMP Agent............................................................................................ 12-26
12-3-1 SNMP Agent Errors ................................................................................................................ 12-26
12-3-2 Event Log Error Codes for the SNMP Agent .......................................................................... 12-26
Section 13 Communications Performance and Communications
Load
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