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PROFIBUS DP
Acronym for "PROFIBUS for Decentralized Peripherals". Specification of an open
fieldbus system with the following characteristics:
•
Polling master-slave-system (cyclic communications, MS0)
•
Flying masters with robin round token passing coordination (MM)
•
Connection based (MS1) and connectionless (MS2, MS3) acyclic
communication between masters and slaves
Options (e.g.):
•
Data exchange broadcast (DXB), i.e. slave to slaves communication
•
Isochronous mode of slaves
•
Clock synchronization
•
Redundancy
PROFIBUS DP is standardized within IEC 61158 and IEC 61784, communication
profile families 3/1 and 3/2
The term "PROFIBUS DP" also is a synonym for the RS485 based deployments
within factory automation.
PROFIBUS PA
Acronym for "PROFIBUS for Process Automation". This is an application profile
based on PROFIBUS DP independent from the physical profiles (RS485, Fiber
Optics, MBP). The requirements of continuous manufacturing are covered within
the application profile "PA-Devices" and the extension MBP to the physical
profiles.
ProfiTrace OE
ProfiTrace Over Ethernet.
A ProfiTrace core which has been implemented in ComBricks that permanently
monitors the installation through the repeaters and visualizes the information in
a web server.
Reflection
Part of the original signal that is transmitted back along the cable. It corrupts the
original signal.
Repeater
Active physical layer device that receives and retransmits all signals over a
different port to increase the distance and number of devices for which signals
can be correctly transferred for a given medium.
SD card
Secure Digital (SD) is a non-volatile memory card format developed by the SD
Card Association for use in portable devices, like: cameras, phones and game
players. The SDHC (High-Capacity) card family has a capacity of 4 GB to 32 GB.
Spur line
A cable attached to a bus segment with a T-connection . Spurs are not
recommended with PROFIBUS DP. They are prohibited with 12 Mbps and
PROFIsafe operations. German term is "Stichleitung".
Stub line
See
Spur line
.
TBit
See Bit Time.
TELNET
TELetype NETwork
Is a network protocol used to make raw-TCP sessions (terminal-like access).
Basically keyboard commands typed by a remote user can cross the network and
become input for the server. On many operating systems the TELNET client
program is available to communicate without specialized client software. It was
developed in 1969.
Summary of Contents for ComBricks
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Page 213: ...ComBricks User Manual v6 4 0 January 18 PROCENTEC 213 219 44 Certificates ...
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Page 217: ...ComBricks User Manual v6 4 0 January 18 PROCENTEC 217 219 45 Notes ...
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