Snmp Network Protocol - Siemens SIMATIC S7-400H System Manual

Communication
14.1 Communication services
14.1.8

SNMP network protocol

Availability
S7-400H CPUs as of firmware version 6.0 support the SNMP network protocol. The CPUs
must also be configured in this or a higher firmware version for this.
Properties
SNMP (Simple Network Management Protocol) is the standardized protocol for diagnostics
of the Ethernet network infrastructure. In the office setting and in automation engineering,
devices from many different manufacturers support SNMP on the Ethernet. SNMP-based
applications can be operated on the same network in parallel to applications with
PROFINET.
Configuration of the SNMP OPC server is integrated in the STEP 7 Hardware Configuration
application. Already configured S7 modules from the STEP 7 project can be transferred
directly. As an alternative to STEP 7, you can also perform the configuration with the NCM
PC (included on the SIMATIC NET CD). All Ethernet devices can be detected by means of
their IP address and/or the SNMP protocol (SNMP V1) and transferred to the configuration.
Use the profile MIB_II_V10.
Applications based on SNMP can be operated on the same network at the same time as
applications with PROFINET.
Note
MAC addresses
During SNMP diagnostics, the following MAC addresses are shown for the ifPhysAddress
parameter as of FW V5.1:
Interface 1 (PN interface) = MAC address (specified on the front panel of the CPU)
Interface 2 (port 1) = MAC address + 1
Interface 3 (port 2) = MAC address + 2
Diagnostics with SNMP OPC Server in SIMATIC NET
The SNMP OPC server software provides diagnostics and configuration functions for all
SNMP devices. The OPC server uses the SNMP protocol to perform data exchange with
SNMP devices.
All information can be integrated in OPC-compatible systems, such as the WinCC HMI
system. This enables process and network diagnostics to be combined in the HMI system.
Reference
For further information on the SNMP communication service and diagnostics with SNMP,
refer to the
226
PROFINET System Description.
System Manual, 03/2012, A5E00267695-11
S7-400H