Introduction

The SNMP manager transmits read or write requests (Set_Request, Get_Request , Get_Next_Request ), etc.) for objects defined in the MIB - II SNMP. The response is from the SNMP agent of the Modicon M580 module.

Modicon M580 Example

In this example, an SNMP manager on an Ethernet network sends a request to the SNMP agent in the BMENOR2200H RTU module (via a communication module in the same rack) and receives a response:

1 SNMP manager

2 request

3 response (trap)

The module's SNMP agent transmits events (traps) to the manager. The managed trap systems are as follows:

• Coldstart Trap: On the BMENOR2200H module, the event is transmitted following a module supply reset, a processor reset, or the downloading of an application to the PLC.

• Authentication Failure Trap (SNMP v1 only): A transmitted event indicates that a network element cannot be authenticated. The Community Name field in the received message is different from the one that is configured on the module. Enable this trap during the configuration of the module.