Siemens SIMATIC ET 200AL - Page 713

Communications services
3.2 Communications protocols and port numbers used for Ethernet communication
Communication
Function Manual, 12/2017, A5E03735815-AF
27
Protocol
Port number
(2) Link layer
(4) Transport layer
Function
Description
IGMPv2
Internet Group
Management Pro-
tocol
Not relevant (3) Network layer Internet Group Man-
agement Protocol
Network protocol for the organization of
multicast groups.
Reserved 49152 ...
65535
(4) TCP
(4) UDP
- Dynamic port range that is used for the
active connection end point, if the appli-
cation does not determine the local port
number.
If you wish to use this communication,
you must activate the ports in the Win-
dows Firewall.
1
Default setting for Windows assigned interfaces: 81
2
Note: The open user communication provides direct access to the UDP/TCP for the user. The user is responsible for
observing the port restrictions/definitions of the IANA (Internet Assigned Numbers Authority).
3
Do not use ports for OUC, which are already used by other protocols.
4
Do not use ports for OUC, which are already used by other Windows applications.
The following table shows the protocols that are supported in addition to those listed in the
tables for the S7-1500 communications modules (e.g. CP 1543-1).
Table 3- 4 Layers and protocols of S7-1500 communications modules
Protocol
Port number
(2) Link layer
(4) Transport
layer
Function
Description
PROFINET/Industrial Ethernet protocols
Connection-oriented communications protocols
FTP
File transfer
protocol
20 (data)
21 (control)
(4) TCP File transfer
protocol
FTP is used for the transmission of files (only in con-
nection with CP 1543-1).
secureFTP
File transfer
protocol
20 (data)
21 (control)
(4) TCP File transfer
protocol
SecureFTP is used for the transmission of files by
means of a TSL connection (only in connection with
CP 1543-1).
DHCP
Dynamic Host
Configuration
Protocol
68 (4) UDP Dynamic Host
Configuration
Protocol
DHCP is used to retrieve the IP Address Suite from a
DHCP server when starting up the IE interface.
Secure NTPv3
Network time
protocol
123 (4) UDP Network time
protocol
Secure NTP is used to synchronize the CP 1543-1
internal system clock with an NTP server.
SNMP
Simple net-
work man-
agement
protocol
161
162 (trap)
(4) UDP Simple net-
work man-
agement
protocol
SNMPv3 permits the CP 1543-1 to read network man-
agement data (MIBs) from SNMPv3 agent with au-
thentication.
Special consideration S7-1500 MFP:
Port 111: The S7-1500 MFP uses Port 111 to the NFS service for internal communication.