Users Manual Part 2

55EN
DIRIS Digiware D-50 & D-70 - 548088C - 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 Cong conguration 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 le called “MIB” (“Management Information Base”) under a hierarchical and
pre-dened structure. The MIB le of the D-50 / D-70 is named ”socomec-diris-products-mib” and is available from www.
socomec.com
The le must be uploaded in the Management station managing your metering system.
The Tree structure of the MIB contains multiple OIDs (Object Identiers). An OID uniquely identies and labels a managed
object (=parameter from metering devices) in the MIB.
For example, the electrical parameter “Current Inst I1” is identied by one OID. “Current Inst I2” is identied 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 notications 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)