FS-8704-09 – SNMP

Driver Version: 1.03

Document Revision: 2

FieldServer Driver – Ethernet





The SNMP driver allows the FieldServer to transfer data to and from devices over Ethernet using the SNMP version 1 protocol. The FieldServer can emulate either a Server (SNMP Agent) or Client.

The Client can be configured to read values specified by their SNMP Object Identifiers (OID’s), which are defined in the MIB file (Management Information Base) of the target device.  When acting as an SNMP Agent (Server), the driver makes the contents of specified integer data arrays available to any SNMP Client.  The FieldServer MIB file sets out the OID’s to use.

The current version of the driver can send and receive SNMP traps. The following SNMP data types are currently supported:

  • · STRING


The maximum number of traps currently supported is 255.

The FieldServer Enterprise ID is 6347.  MIB files are generated automatically from the FieldServer configuration files. A selection of standard MIB-2 OID’s are supported to allow interaction with popular Network Management packages.

FieldServer Mode Nodes Comments
Client 25 Each Node is specified by a unique IP address
Server 1 As a Server the SNMP driver can act as a single Node only


Formal Driver Type


Client (Active or Passive) or Server


Compatibility Matrix

FieldServer Model Compatible with this driver
FS-x2010 Yes
FS-x2011 Yes
FS-x25 Yes
FS-x30 Yes
FS-x40 Yes
SlotServer Yes


Connection Information

Connection type: Ethernet
Ethernet Speeds Supported 10Base-T, 100Base-T[1]


Devices tested

Device Tested (FACTORY, SITE)
MG-Soft MIB Browser and Trap Ringer Factory
Visual MIBrowser Pro from NuDesign Factory


Connection configurations

1. FieldServer as SNMP Agent (Server)

2. FieldServer as SNMP Client

Connection Notes

1. TCP/IP Configuration: Ensure that the FieldServer and all Nodes to be monitored via SNMP have the same Netmask setting.

2. Default IP ports

  • Port 161 – Poll/Walk commands
  • Port 162 – Traps

Communications functions -Supported functions at a glance:

Data Types Supported

FieldServer Data Type Description (or Device Data Type)
OCTET_STREAM Character strings
TIMER_TICKS Timer values in 1/100ths of a second


MIB-2 Variables Supported

Many Network Management systems poll these variables to connect to the SNMP Agent.

OID Description (or Device Data Type) sysDescr sysObjectID sysUpTime sysContact sysName sysLocation sysServices


Read Operations supported

FieldServer as a Client FieldServer as a Server
SNMP Get Request SNMP Get Request
SNMP GetNext Request / SNMP Walk ( SNMP GetNext Request / SNMP Walk


Write (Control) Operations supported

FieldServer as a Client FieldServer as a Server
SNMP Set Request SNMP Set Request


Unsolicited Operations supported

FieldServer as a Client FieldServer as a Server
Receive Traps specified by OIDData stored by matching OID or by using OID string values to form lookup string. Send Traps specified by OIDTrap sent based on data change rules, periodic or on source data update.


Unsupported Functions and Data Types

Data Types Reason
Only the following SNMP Data Types are supported:INTEGER




Further types will be implemented as required.
MIB-2 variables not specified above The FieldServer primarily being a protocol converter, these variables are not necessary.


Unsupported Devices or Protocol Options

Protocol Versions Details
SNMPv2, SNMPv3 Not supported

[1] Not all FieldServer models support 100BaseT.  Consult the appropriate instruction manual for details of the Ethernet speed supported by specific hardware.

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