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Glossary

Introduction to PROFIBUS on Industrial PC

C79000-G8976-C068

Type identifier of a -> DP I/O module in the -> device master data of a

-> DP slave complying with EN 50 170, Volume 2.

A -> station with slave functions in -> PROFIBUS DP.

The DP slave catalog contains the device descriptions of -> DP slaves

required for configuring -> DP masters according to the -> DP

standard. The DP slave catalog is available when configuring with ->

COM PROFIBUS.

A DP slave name is entered in the DP slave list to identify a -> DP

slave in the DP configuration.

PROFIBUS subnet in which only -> distributed I/Os are operated.

A -> DP master and all -> DP slaves with which this DP master

exchanges data.

Software required for the data transfer between applications and the ->

CP.

Enhanced mode under 3.x for personal computers with an Intel 386 or

compatible processor.

Fieldbus Data Link. Layer 2 in -> PROFIBUS.

A message from one PROFIBUS station to another.

A frame header consists of an identifier for the -> frame and the source

and destination address.

A frame trailer consists of a checksum and the end identifier of the ->

frame.

The FREEZE mode is a DP mode in which process data are acquired

at the same time and fetched from all (or a group of) DP slaves. The

time at which the data are acquired is indicated in the FREEZE

command (a synchronization control frame).

A free address area (gap) between two active -> stations is checked

cyclically by the station with the lower -> PROFIBUS address to find

out whether or not another station is requesting to enter the logical ring.

The cycle time for this check is as follows:

gap update factor x target rotation time

Intelligent connectivity device that connects different types of local

area -> networks at OSI layer 7.

DP module type

DP slave

catalog

DP slave name

DP subnet

DP subsystem

Driver

Enhanced mode

FDL

Frame

Frame header

Frame trailer

FREEZE mode

Gap update

factor

Gateway

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