Snmp - Siemens SIMATIC S7-400 Operating Instructions Manual

Diagnostics and maintenance

6.2 SNMP

Web diagnostics
The CP provides you with the functionality of a Web server for access using a Web browser.
You will find suitable Web browsers in the section Web browser for access using HTTPS
(Page 21).
With the aid of a Web server of the CP (see below) you can read out diagnostics data from
the S7 station connected via the CP to a PG/PC with a Web browser
The HTML pages are used to transfer and display information in a Web browser. This makes
it possible to read the diagnostics buffers of the intelligent modules in the rack.
Using the integrated update center of the diagnostics pages, you can download new
firmware files and language files for diagnostics to the station.
If you do not require the functions, you can disable them in the STEP 7 configuration and
block port 443.
To use the Web server functionality of the CP, enable the relevant option in STEP 7 in the
module properties, "Web" parameter group (STEP 7 V5) or "Security > Web server"
(STEP 7 Professional).
As default, this function is disabled.
You will find more information on Web diagnostics in the manual /2/ (Page 133).
Access to the Web server
With the following address, you have access to Web diagnostics:
https://<IP address of the CP>
Diagnostics buffer entries
When the CP is supplied, diagnostics buffer entries shown on diagnostics pages are always
in English. This is not influenced by the language selected for display of the Web pages.
How to load other languages on the CP is described in the manual /2/ (Page 133).
6.2 SNMP
SNMP (Simple Network Management Protocol)
SNMP is a protocol for management and diagnostics of networks and nodes in the network.
To transmit data, SNMP uses the connectionless UDP protocol.
The information on the properties of SNMP-compliant devices is entered in MIB files (MIB =
Management Information Base).
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Operating Instructions, 01/2017, C79000-G8976-C427-02
CP 443-1 OPC UA