Siemens SIMATIC NET TeleControl SINAUT ST7, Системное руководство

Страница: 288 / 294

Glossary
SINAUT ST7 station control system
288
System Manual, 09/2016, C79000-G8976-C178-10
It is specially designed for event-driven and time-stamped data transmission in the SINAUT
system. It avoids the possible loss of data that can occur with cyclic polling in WinCC. It also
ensures the use of the correct event time supplied by the SINAUT stations for all WinCC
messages and archive entries. The integrated process image contains all process data as
well as the status of all SINAUT subscribers in the network and makes this data available
directly to WinCC for fast transfer to the process image.
ST7sc
The SINAUT system allows the networking of SIMATIC stations with a control center over a
WAN. This control center can also be a SIMATIC station or a PC-based control center, for
example, WinCC with the SINAUT ST7cc add-on.
SINAUT ST7sc allows the manufacturers of control systems to connect to SINAUT without
needing to integrate a SINAUT interface. Communication is over OPC: As an OPC server,
SINAUT ST7sc forms the interface between the SINAUT system and a control system
connected as an OPC client.
The OPC interface is also suitable for data exchange with other applications, for example,
the Microsoft Office application Excel.
Station
In the SINAUT world, the term station includes the entire hardware components required for
acquisition, processing and communication with other stations or a master station. A station
can, for example, consist of a modem, a TIM and a programmable controller (in turn
consisting of a CPU and I/O modules). A SINAUT station can also include several
programmable controllers, or, in the case of a node station, several TIMs.
Station TIM
WAN interface of a TIM set to the "station" function. Use in stations.
Status message
A status message is a process status (for example pump on, valve open) or alarm (for
example limit value exceeded). This is binary information with the values 0 or 1. 8 messages
are put together to form a byte.
TCP
→
TCP/IP, UDP
TCP/IP, UDP
Transmission Control Protocol / Internet Protocol, User Datagram Protocol
Network protocols for connecting two subscribers in the Internet. IP is the basic protocol.
● TCP is used to make the connection reliable and makes sure, for example, that data
packets are passed on to the application in the correct order. In addition to the IP