Siemens Simatic S7-300 CPU 31xC Series User Manual

Glossary
S7-300, CPU 31xC and CPU 31x: Installation
Glossary-16 Operating Instructions, Edition 08/2004, A5E00105492-05
PROFINET Component
A PROFINET component includes the entire data of the hardware configuration, the
parameters of the modules, and the corresponding user program. The PROFINET
component is made up as follows:
• Technological Function
The (optional) technological (software) function includes the interface to other PROFINET
components in the form of interconnectable inputs and outputs.
• Device
The device is the representation of the physical programmable controller or field device
including the I/O, sensors and actuators, mechanical parts, and the device firmware.
PROFINET IO
Within the framework of PROFINET, PROFINET IO is a communication concept for the
implementation of modular, distributed applications.
PROFINET IO allows you to create automation solutions familiar from PROFIBUS.
PROFINET IO is implemented by the PROFINET standard for the programmable controllers
on the one hand, and on the other hand by the engineering tool STEP 7.
This means that you have the same application view in STEP 7 regardless of whether you
configure PROFINET devices or PROFIBUS devices. Programming your user program is
essentially the same for PROFINET IO and PROFIBUS DP if you use the expanded blocks
and system status lists for PROFINET IO.
PROFINET IO Controller
See PROFINET IO Device
See PROFINET IO Supervisor
See PROFINET IO System
Device via which the connected IO devices are addressed. This means that the IO controller
exchanges input and output signals with assigned field devices. The IO controller is often the
controller on which the automation program runs.
PROFINET IO Device
See PROFINET IO Controller
See PROFINET IO Supervisor
See PROFINET IO System
Distributed field device assigned to one of the IO controllers (for example, remote I/O, valve
terminal, frequency converter, switches)
PROFINET IO Supervisor
See PROFINET IO Controller
See PROFINET IO Device
See PROFINET IO System
PG/PC or HMI device for commissioning and diagnostics.

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)