Siemens SIMATIC NET S7-300 User Manual

D Glossary
A-299
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
PROFINET
Standard of the PROFIBUS Users organization defining a heterogeneous
communications and engineering model.
Protocol
A set of rules for transferring data. Using these rules, both the formats of the
frames and the data flow are specified.
Process image
The process image is a special memory area in the programmable logic
controller. At the start of the cyclic program, the signal states of the input
modules are transferred to the process input image. At the end of the cyclic
program, the process output image is transferred as a signal state to the output
modules.
Segment
Synonym for -> Bus segment.
Server
A server is a device, or in general terms, an object that provides certain services.
A service is started at the instigation of a -> client.
Services
Services provided by a communication protocol.
SIMATIC NET
Siemens SIMATIC Network and Communication. Product name for -> networks
and network components from Siemens. (previously SINEC)
SIMATIC NET Ind. Ethernet
SIMATIC NET LAN system for industrial applications based on Ethernet.
(previously SINEC H1)
SIMATIC NCM PC
SIMATIC NCM PC allows STEP 7-compatible configuration for SIMATIC NET
PC components and replaces the previous PC configuration tools COML S7 and
COM PROFIBUS PC Edition. By sharing a common database with STEP 7, fully
integrated configuration including all protocols is ensured.

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)