Technical data

Glossary
Software
450 System Manual, 07/2009, C79000-G8976-C222-07
DSL is used mainly for transmission of telephone and Internet data. By using a higher
bandwidth, data can be transmitted at transmission speeds in the two to three figure Mbps
range.
Ethernet / Industrial Ethernet
Industrial Ethernet is a powerful communication network complying with the international
standard IEEE802.3 (Ethernet) that was optimized to meet the requirements of industrial
application. Ethernet is designed with a linear or star topology. The transmission media are
shielded coaxial cables, twisted pair, or fiber-optic cables. SIMATIC NET Industrial Ethernet
uses both the Ethernet and Fast Ethernet standards.
Ethernet TIM
→ TIM
Firewall
A firewall is a network component via which a secure network can be linked with an
unsecure network. The task of a firewall is to control data exchange between the networks.
General request (GR)
With a general request, subscribers in a SINAUT network can request a current process
image from their communications partners. This happens automatically when a disrupted
connection has been restored or when a failed partner reports a restart. Apart from the
automatic general request, a general request can also be triggered at any time by the user
program or from the control center.
TD7onTIM does not support the general request.
Global Script (Runtime)
The term Global Script means all the C functions and actions that can be used throughout
the project or over several projects. C actions are used in process control during runtime.
GPRS
(General Packet Radio Service)
GPRS is an expansion of GSM mobile wireless that adds packet-oriented data transmission.
Network connections are established over GPRS either in the Internet or in private networks.
The data is transmitted using the Internet protocols TCP/IP or UDP/IP.
GPS
(Global Positioning System)
GPS is a worldwide US satellite navigation system for highly accurate location, navigation
and time distribution. It operates with 24 orbiting satellites (21 operational and 3 spare
satellites) on six satellite orbits at a height of approximately 20,000 kilometers. Each satellite
contains an atomic clock whose time is transmitted continuously along with the orbit data.