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User Instructions UM1M820BNA
Spec No. 1M820BNA (Model M820B) Issue AH, March 4, 2013
Spec No. 1M820DNA (Model M820D)
Chapter 5. Accessing the Controller via a Network Management System (NMS) 159
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
CHAPTER 5. ACCESSING THE CONTROLLER
VIA A NETWORK MANAGEMENT SYSTEM (NMS)
5.1 General
The Controller has an SNMP agent function.
Users can use a Network Management System (NMS) to do following operations:
Query the operation status and input/output signals of the devices connected to the Controller.
Browse the active alarms.
When the Controller generates alarms, the SNMP agent can notify the preset NMS through TRAPS
automatically.
5.2 NMS Supported by SNMP Agent
The SNMP agent of the Controller supports SNMPv2c.
All the NMS that supports SNMPv2c can be used to access the Controller. The NMS includes HP
OpenView, IBM NetView, Novell ManageWise, SunNet Manager and so on. SNMP is a technology used
for network management. The technology is based on implementing an information base called MIB
(Managed Information Base). This MIB contains parameters that are of interest from a management
perspective. All LAN connected equipment that support SNMP also support a default MIB called MIB-II.
The SNMP Agent responds to requests received via the SNMP protocol and also actively sends TRAPS
to a specified manager when certain MIB values change state. This is used to actively inform a manager
when an alarm situation is recognized.
5.3 MIB Installation
5.3.1 Installation
The Controller’s MIB is named "Netsure_ESNA.mib". Contact your Emerson representative for the
location on the Web to download the MIB file.
Use the MIB loading function of NMS to load the MIB database, refer to the corresponding NMS User
Manual for the detailed loading method.
5.3.2 Contents of the Controller’s MIB
The contents of the MIB supported by the Controller’s SNMP agent and the OID are listed in Table 5. For
the details, refer to the file named "Netsure_ESNA.mib".