Glossary
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Glossary
Address
→
Station address
ANZW
16 bit in-out variable for sending commands to an FB and re-
ceiving return values.
Bit
Abbreviation for
bi
nary digi
t
, the smallest unit in the binary sys-
tem; it can have the value 0 or 1.
Bus
Cable with two defined ends which is used for exchanging data
between the connected bus stations.
Bus connector
Plug used to connect the bus stations to the bus cable.
Bus segment
→
Segment
Bus station
Device attached to the bus which can send data over the bus
(e.g. DP master), receive data over the bus (e.g. DP slave), or
amplify signals (e.g. repeater).
Byte
A byte consists of eight bits and is the smallest addressable
amount of memory.
Character timeout
Used to detect the end of a telegram in the case of an unstruc-
tured flow of ASCII data. The telegram currently being received
is considered to be completed when the time between two re-
ceived characters is larger than the specified character timeout.
Command byte
→
Stamp
Configuration
During configuration, the modules and the addresses of the DP
slave are assigned. The actual configuration describes the
modules which are actually present in the slave. the required
configuration describes the modules which should be present in
the slave. This approach allows an incorrect configuration to be
detected when the system is booted.
Configurator
Software for configuring PROFIBUS devices and for setting pa-
rameters.
Control information
Used to synchronize and fragment the exchange of telegrams
via PROFIBUS DP. Control information is always contained in
the first byte (byte 0) of the DP data channel.
