Omron Sysmac NJ-series User Manual

13-3
13 SNMP Agent
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
13-1 SNMP Agent
13
13-1-2 Specifications
When a failure or some other specific problem occurs, a status report called a trap is sent. This enables
monitoring changes in status even if the SNMP manager does not monitor the built-in EtherNet/IP port
periodically. However, traps use UDP. Therefore, you cannot check to see if the SNMP manager
receives traps from the EtherNet/IP port. Thus, depending on the network status, some traps may not
reach the SNMP manager.
The structure of SNMP messages is as follows:
SNMP Traps
13-1-2 Specifications
Item Specification
Protocol SNMP
Agent SNMPv1, SNMPv2c
MIB MIB-II
Port No. SNMP agent: 161 (UDP)
SNMP trap: 162 (UDP)
These can be changed in the Built-in EtherNet/IP Port Settings from the Sysmac
Studio.
Timing of SNMP trap opera-
tion
Status reports are sent to the SNMP manager at the following times.
• When the Controller is turned ON
• When links are established
• When an SNMP agent fails to be authorized
Supported MIB commands GetRequest/GetNextRequest
13-1-3 SNMP Messages
Item Set value
Version This value gives the SNMP version.
SNMPv1: 0
SNMpv2c: 1
Community Community name for verification
PDU This depends on the PDU type.
Built-in EtherNet/IP port
SNMP manager
Trap
SNMP agent
MIB
Controller power supply
turned ON.
MAC header IP header UDP header SNMP message
Variable length (1,472 bytes max.)
Version Community PDU

Omron Sysmac NJ-series Specifications

General

Brand	Omron
Model	Sysmac NJ-series
Category	Computer Hardware
Language	English