Siemens SIMATIC NET S7-300 User Manual

D Glossary
A-300
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
SINEC
Previous product name for-> networks and network components from Siemens.
Now: SIMATIC NET
Station
A station is identified by a
 MAC address in the Ethernet network
 PROFIBUS address in the PROFIBUS network
Subnet
A subnet is part of a -> network whose parameters (for example -> PROFIBUS)
must be matched. The subnet includes bus components and all the attached
stations. Subnets can, for example, be connected together by -> gateways to
form a network.
A -> system consists of several subnets with unique -> subnet numbers. A
subnet consists of several -> stations with unique -> PROFIBUS or MAC
addresses (Industrial Ethernet).
System
This means all the electrical equipment within a system. A system includes,
among other things, programmable logic controllers, devices for operation and
monitoring, bus systems, field devices, actuators, supply lines.
Transport layer
The transport layer is layer 4 of the ISO/OSI reference model for open system
interconnection. The purpose of the transport layer is to transfer data reliably
from device to device. Transport connections can be used for the transmission.
Transport interface
The transport interface of a SIMATIC S5 PLC is the access to the
connection-oriented services of the transport layer on the CP. The transport
interface presents itself to the control program in the form of handling blocks
(HDBs).
TSAP
Transport Service Access Point

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)