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Integration in bestehende Systeme
SNMP
Both the IOs and the configuration of the Web-IO can be accessed via SNMP. The
assignment between parameters and values and the object identifiers (OID) is
stored in the private MIB. The private MIB can be downloaded directly from the Web-
IO under
Communication Channels » SNMP
(alternative download at http://www.
WuT.de).
The MIB can easily be viewed with one of the common MIB browsers. This is the
fastest way to get an overview of the assignment of the OIDs.
You can make all SNMP-related settings under
Communication paths » SNMP.
If the
outputs are to be switchable via SNMP, they must be enabled here.
Opening an SNMP session
Read access is possible using SNMP-Get requests after enabling SNMP under
Communication paths >> SNMP
. Write/altering access requires a session login with
an administrator password entry.
This is done using SNMP-SET via the OID which you can find in the MIB branch of
your Web-IO under:
wtWebioEA….SessCntrl » wtWebioEA….SessCntrlPassword
Whether there is a valid session opened can be queried using a GET request to the
OID:
wtWebioEA….SessCntrl » wtWebioEA….SessCntrlConfigMode.
(Return: 1 = valid session, 0 = no session.)
A session can be ended using SET to the OID
wtWebioEA….SessCntrl » wtWebioEA….SessCntrlLogout
During an SNMP session login attempts from the browser are rejected.
