Siemens SIMATIC ET 200AL - Page 690

Preface
Communication
4 Function Manual, 12/2017, A5E03735815-AF
What's new in the Communication Function Manual, Edition 12/2017 compared to Edition 09/2016
What's new?
What are the customer benefits?
Where can I find the infor-
mation?
New contents OPC UA Companion
Specification
The OPC UA Companion Specification allows for
methods to be specified uniformly and multi-
vendor. Using these specified methods, you can
easily integrate devices from various manufactur-
ers into the plant and the production processes.
Section Using OPC UA infor-
mation models (Page 203)
Setting up a secure
connection to a mail
server over the CPU
interface
You can set up a secure connection to a mail
server without additional hardware.
Section Secure OUC via e-mail
(Page 108)
Secure communica-
tion over Modbus
TCP
You can establish secure TCP connections be-
tween a Modbus TCP client and a Modbus TCP
server.
Section Secure OUC with
Modbus TCP (Page 107)
What's new in the Communication Function Manual, Edition 09/2016 compared to Edition 12/2014
What's new?
What are the customer benefits?
Where can I find the infor-
mation?
New contents OPC UA server OPC UA is a uniform standard for data communi-
cation and is independent of any particular operat-
ing system platforms.
OPC UA uses integrated safety mechanisms on
various automation systems, for example with
data exchange, at application level, for the legiti-
mation of the user.
The OPC UA server provides a large amount of
data:
• Values of PLC tags that clients can access
• Data types of these PLC tags
• Information about the OPC UA server itself
and the CPU
In this way, clients can gain an ov
erview of the tag
management and can read and write values.
Section OPC UA communica-
tion (Page 126)
Secure Open User
Communication
Secure data exchange with other devices. Section Secure Open User
Communication (Page 93)
Certificate handling
in
STEP 7
You can manage certificates for the following
applications in STEP 7:
• OPC UA server
• Secure Open User Communication
• Web server of the CPU
Section Managing certificates
with STEP 7 (Page 45)
Deactivating SNMP
for the CPU
You can deactivate SNMP for the CPU. This can
make sense under certain conditions, for example
if the security guidelines in your network do not
permit SNMP.
Section Disabling SNMP
(Page 58)