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DIRIS Digiware D-50 & D-70 - 548088B - SOCOMEC
ANNEx I. SNMP COMWMUNICATION WITH THE DIRIS DIGIWARE D-50 / D-70
Annex I - 1. SNMP generalities
SNMP stands for Simple Network Management Protocol and is widely used by administrators for an easy network
monitoring of devices on IP networks. It works in a client-server communication mode on an Ethernet physical layer.
Once enabled from the Easy Config configuration software, the DIRIS Digiware D-70 display supports SNMP v1, v2 and
v3.The D-50 / D-70 is an agent SNMP v1, v2, v3 which responds to queries from managers (also called management
stations or supervisors).
The D-50 / D-70 allows access through SNMP of measurement data from SOCOMEC slaves connected via the RS485
bus or the Digiware bus.
Data from the slaves can be reached through a file called “MIB” (“Management Information Base”) under a hierarchical and
pre-defined structure. The MIB file of the D-50 / D-70 is named ”socomec-diris-products-mib” and is available from www.
socomec.com
The file must be uploaded in the Management station managing your metering system.
The Tree structure of the MIB contains multiple OIDs (Object Identifiers). An OID uniquely identifies and labels a managed
object (=parameter from metering devices) in the MIB.
For example, the electrical parameter “Current Inst I1” is identified by one OID. “Current Inst I2” is identified by another one.
COMMON SNMP TERMS
CONSUMPTION CURVES
AGENT
Corresponds to the DIRIS Digiware D-50 / D-70: Interface between the PMDs and the manager
MANAGED DEVICE
The PMDs connected downstream the D-50 / D-70 (ex: I-35, DIRIS B, DIRIS A…)
MIB
Management information base where the OIDs are organized in a hierarchical tree
OID
An object identifier that uniquely identifies and labels a managed object in the MIB hierarchy
COMMUNITY STRINGS
A text that enables the authentication between an agent and the manager
TRAPS
Notifications sent by the agent and received by the manager
Annex I - 2. SNMP functions supported
There are 4 types of SNMP requests supported by the DIRIS Digiware D-50 / D-70:
•
GetRequest:
to retrieve the variable of an OID (I1 Inst for example)
• GetNextRequest:
to retrieve the variable of the next OID (I2 Inst in this case)
•
GetBulk:
to retrieve multiple variables gathered together
• SetRequest:
to change the value of one variable such as the state of a Digital output.
• Traps:
Unlike the above commands which are initiated by the SNMP manager, Traps are initiated by the Agents with
no solicitation from the Manager. Traps are notifications to the Manager by the Agent of the occurrence of an event
and/or alarm..
Traps are sent by the agent in case one of the following alarms occurs:
•
Alarm on a measurement
•
Logical alarm (change of status of a Digital input)
•
Combination alarms
•
PQ events (inrush, voltage swells, voltage sags/dips, voltage interruptions)
•
System alarms (Phase Rotation, CT disconnect, VI association)
