FS-8704-26 – SNMP Standard

Driver Version: 1.04

Document Revision: 0

FieldServer Driver – SNMP-STD



The SNMP-STD driver allows the FieldServer to transfer data to and from devices over Ethernet using the SNMP Version V1 or V2c protocol. The FieldServer can emulate a Server (SNMP Agent) or Client (NMS Network Management Station).

The FieldServer provides a generic MIB (Management Information Base) file that sets out the OID (Object Identifiers) structure. The FieldServer Enterprise ID is 6347. A selection of standard MIB-2 OID’s are supported to allow interaction with popular Network Management packages.

When configured as an SNMP Agent (Server) the SNMP – STD driver allows SNMP Get, GetNext(walk) and Set commands to access Data Arrays using the Integer type. The SNMP v1 protocol does not make provision for Floats.

The SNMP-STD driver can send SNMP traps. The structure for SNMP Traps is provided in the FieldServer’s generic MIB file.

The FieldServer also support custom MIBs. It supports setting a custom enterprise ID, object names and custom traps or informs. In custom configurations he FieldServer supports various data types as specified in section 6.1.

When configured as a Client, the FieldServer can read objects from the Server using Get, GetNext(walk) or GetBulk commands. The GetBulk command is very useful to transfer large amounts of data. The FieldServer can update objects in Agent using the Set command.

The FieldServer can accept any trap or inform as long as all the objects in the message are encoded with a full OID. The Client side of the driver is considered as a custom configuration.

Nodes Comments
Client 10 The SNMP driver can be
configured to communicate
with remote agents.
Server 1 The SNMP driver can be
configured as a single Server


Former Driver Type

Client or Server


Compatibility Matrix

FieldServer Model Compatible with
this driver
FS-x2010 Yes
FS-x2011 Yes
FS-x30 Yes
FS-x40 Yes
SlotServer Yes
ProtoNode Yes
QuickServer FS-QS-10xx Yes
QuickServer FS-QS-12xx Yes
ProtoCessor FPC-ED2 Yes
ProtoCessor FPC-ED4 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
Net-SNMP Site


Communications functions – Supported functions at a glance:

Data Types Supported

For Standard Configuration:

Data Type
Description (or Device Data Type)
Integer Signed integer (8 – 32 bits)
Octet String Character strings (0 -255 characters)
TimeTicks Timer values in 1/100ths of a second

For Custom Configuration:

Data Type
Integer Signed integer (8 – 32 bits)
Octect String Character string (0 -255 characters)
Displaystring Null terminated character string (0 –
255 characters)
Integer32 Signed integer (8 – 32 bits)
Counter Unsigned integer (8 – 32 bits)
Counter32 Unsigned integer (8 – 32 bits)
Counter64 Unsigned integer (8 – 64 bits)
Gauge Unsigned integer (8 – 32 bits)
Gauge32 Unsigned integer (8 – 32 bits)
Unsigned32 Unsigned integer (8 – 32 bits)
Bits 32bit integer representing 32 states
Timeticks Time value in 1/100th 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 sysObjID sysUpTime sysContact sysName sysLocation


Read Operations supported

FieldServer as a Client FieldServer as a Server
get-request get-request
get-next-request/ SNMP
get-next-request/ SNMP
get-bulk-request/ BulkWalk get-bulk-request


Write (Control) Operations supported

FieldServer as a Client FieldServer as a Server
set-request set-request


Unsolicited Operations supported

Traps are event notifications and do not require acknowledgements. Inform-Request is a service that keeps sending V2-Traps until events get acknowledged.

For Standard Configuration:

FieldServer as a Client FieldServer as a Server
N/A SnmpV1-Trap

For Custom Configuration:

FieldServer as a Client FieldServer as a Server
SnmpV1-Trap SnmpV1-Trap
snmpV2-Trap snmpV2-Trap
Inform-Request Inform-Request


Unsupported Functions and Data Types

Data Types Reason
MIB-2 variables
not specified
Since the FieldServer is primarily a
protocol convertor, these variables
have not been required to date.


 Unsupported Devices or Protocol Options

Protocol Versions Details
SNMPv3 Other versions will be
implemented as required


[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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