Network Access - Siemens SIMATIC S7 User Manual

1.2

Network access

Communicating with Siemens devices
PROFINET devices connected directly to a network are discovered by using the MAC
(Media Access Control) address. A MAC address is unique to each device, cannot be
changed, and is printed on the device. Connected PROFINET devices are discovered
whether they are configured with an IP, subnet, and gateway address, or not configured
(addresses are 0.0.0.0).
However, a directly connected CPU must have a valid IP address, before communication
modules, signal modules, and decentralized I/O that are located behind the CPU become
visible in the SIMATIC Automation Tool device table.
For example, an S7-1500 CPU has a PROFINET network connection to the SIMATIC
Automation Tool and uses a local CP card to connect with another PROFINET network
where decentralized I/O are connected. You must assign a valid IP address to the S7-1500
CPU before the decentralized I/O network is visible in the SIMATIC Automation Tool device
table.
The type of network access you have depends on the command that you execute, as shown
in the following table.
SIMATIC Automation Tool
command
Scan (discover CPUs and I/O de-
vices)
Flash LEDs on devices
Set IP address, subnet mask, and
gateway address on devices
Set PROFINET name on devices
Reset devices to factory default
values
(for PROFINET I/O devices only)
Set CPU time to PG/PC time
Download program to CPUs
Download new firmware to CPUs
and I/O devices
Put CPUs in RUN or STOP
Set CPU time to PG/PC time
Reset CPU memory
Read CPU Diagnostic buffer
Upload service data from CPUs
Backup/restore CPU data
Reset devices to factory default
values
(for CPU devices only)
SIMATIC Automation Tool V2.1 user guide
Manual, V2.1.1 07/2016, A5E33042676-AC
Device Must provide CPU
address password for a pro-
used tected CPU
MAC No
MAC No
MAC No
MAC No
MAC -
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
IP Yes
SIMATIC Automation Tool overview
PG/PC and device connectivity
Local network: You can access devices
•
through Ethernet switches, but cannot access
devices on another network through an IP ad-
dress router.
VPN (Virtual Private Network) connection to a
•
local network
Local network: You can access devices
•
through Ethernet switches.
Remote network: You can access devices on
•
another network through an IP address router.
VPN connection to local network
•
1.2 Network access
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