Siemens SIMATIC NET S7-300 User Manual

D Glossary
A-302
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
ISO -on-TCP
Transport layer connection (layer 4 communication complying with ISO)
simulated on TCP.
On an ISO-on-TCP connection, messages can be exchanged in both directions.
TCP provides the data flow communication without segmenting the data into
messages. ISO, on the other hand, is message-oriented. With ISO-on-TCP, this
mechanism is simulated on TCP. This is described in RFC1006 (Request For
Comment).
ISO-on-TCP connections allow program/event-controlled communication via
Ethernet from a SIMATIC S7 PLC to
 SIMATIC S7 PLC with Ethernet CP
 SIMATIC S5 PLC with Ethernet CP
 PC/PG with Ethernet CP
 any system
ISO Transport Connection
Communication connection of the transport layer (with the CP/COM 143
previously S5S5 connection).
ISO transport connections allow program/event-controlled communication on
Industrial Ethernet between SIMATIC S7 PLCs and
 SIMATIC S7 PLC with Ethernet CP
 SIMATIC S5 with an Ethernet CP (e.g. CP 143 or CP 1430)
 PC/PG with Ethernet CP (for example CP 1613)
 Any system using the ISO transport protocol (ISO 8073)
The transfer of blocks of data on an ISO transport connection is bi-directional.
MAC address
Address to distinguish between different stations connected to a common
transmission medium (Industrial Ethernet).
Media Access Control (MAC)
Mechanisms for controlling access by a station to a common transmission
medium shared with other stations.
RFC1006
see ISO-on-TCP

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)