Siemens S7-300 Configuration Manual page 17

Possible types of communication /
mechanisms
Email communication
Security functionality
1) Where the term "FTPS" is used in this documentation, FTPS in the explicit mode is meant
Types of communication
● PG/OP communication
● S7 communication
● Open communications services (SEND/ RECEIVE)
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
(PTPES).
PG/OP communication is used to download programs and configuration data, to run tests
and diagnostics functions, and to control and monitor a plant from OPs.
S7 communication forms a simple and efficient interface between SIMATIC S7 stations
and PGs/PCs using communication function blocks.
Depending on the CP type, the SEND/RECEIVE interface allows programcontrolled
communication on a configured connection from a SIMATIC S7 PLC to another SIMATIC
S7 PLC, to a SIMATIC S5 PLC, to PCs/PGs, and to third-party stations.
Depending on the CP type, the following communications services are available on the
SEND/RECEIVE interface:
– ISO transport
Optimized for top performance at the selfcontained manufacturing level.
– IP-based services for internetwork communication
This includes:
ISOonTCP connections (RFC 1006), TCP connections and UDP datagram service
(including broadcast / multicast).
Communication via Ethernet CPs in S7 stations
1.3 SIMATIC S7 communication options with Ethernet CPs
Interfaces / services / protocols
With the protocols
SMTP / ESMTP
•
Firewall
•
VPN
•
SNMPv3
•
Syslog
•
NAT / NAPT
•
NTP (secured)
•
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