Glossary
Communication
Function Manual, 12/2017, A5E03735815-AF
255
Generic term for all the measures taken to protect against
● Loss of confidentiality due to unauthorized access to data
● Loss of integrity due to manipulation of data
● Loss of availability due to the destruction of data
These are certificates that you sign with your private key and use as end-entity certificates.
The signature of these end-entity certificates is verified with your public key.
The "Subject" and "Issuer" attributes of self-signed certificates must be identical: You have
signed your certificate yourself.
The "CA" field must be set to "False".
You can, for example, use self-signed certificates as application certificates for an OPC UA
client.
The procedure required to generate a self-signed certificate with the certificate generator of
the OPC Foundation is described here (Page ).
A device or more generally an object that can provide certain services; the service is
performed at the request of a client.
Distributed device in a fieldbus system that can only exchange data with a master after the
master has requested this.
→
See also DP slave
imple
etwork
anagement
rotocol, uses the wireless UDP transport protocol. SNMP
works in much the same way as the client/server model. The SNMP manager monitors the
network nodes. The SNMP agents collect the various network-specific information in the
individual network nodes and makes this information available in a structured form in the MIB
(
anagement
nformation
ase). This information allows a network management system to
run detailed network diagnostics.
Part of a network whose parameters must be matched up on the devices (for example in
PROFINET). A subnet includes the bus components and all connected stations. Subnets can
be linked together, for example using gateways or routers to form one network.
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