Communications processors for SIMATIC S7
8.4 Communications processors for SIMATIC S7-400
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
325
The communication processors support:
● PG/OP communication
● Communication via OPC UA as OPC UA server and/or OPC UA client for exchanging
process data (data access)
With this CP, the SIMATIC S7-400 control unit exchanges data via a standardized OPC UA
interface with other nodes. The CP can be used as OPC UA Server and/or OPC UA Client.
The communication as OPC UA Client takes place via the application blocks standardized by
the PLCOpen organization.
The device has the following additional characteristics and functions:
● 1x RJ45 socket for the connection to Industrial Ethernet with 10/100/1000 Mbps
(full/half duplex)
Connection is possible via an IE FC RJ45 Plug 180 with 180° cable outlet or via a
standard patch cable.
● Automatic data rate detection with autonegotiation and autocrossover function.
● Diagnostic LEDs for displaying the operational and communication status.
● Fanless operation of the communication processor
● The communication services operate via the following interfaces:
– As an OPC UA server: Read/write access for data exchange (DA), access via
subscriptions
– As an OPC UA client: Read/write access for data exchange (DA). Communication via
standardized function blocks according to PLCopen
– Programming device communication via configuration of the CP, internetworking with
S7 routing
– Forwarding the time to the CPU as NTP time client (optional secure NTP) module
replacement without programming device: All configuration information is stored on
the CPU
– The CP can operate simultaneously as an OPC UA Server and OPC UA Client.
Corresponding restrictions of the configuration limit can be found in the manual
● Diagnostics and network management:
– With HTTPS via a Web browser
– Standard diagnostics and extended diagnostics in STEP 7
– Integration in network management systems by supporting SNMP V1/ V3
● Security mechanisms:
– Access protection through authentication via certificate, encryption and signing of data
– HTTPS communication with the webserver
● A wide range of diagnostic options with LEDs, in STEP 7 and Web-based diagnostic units
with monitoring by IT network management tools (SNMP V1 MIB II)
● Configuration of all functions with STEP 7 as of V5.5
● Configuration with STEP 7 Professional V14 or higher
● Module replacement without programming device by storing all data on the CPU
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