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6 Glossary
Address
Analyzer
Backbone
Bit Time (Tbit)
Busparameters
C
DGND
DIN
DP-V0
DP-V1
ProfiHub B2FOR+ / B4FOR+ User Manual | August 2019 | © PROCENTEC
Unique number of a device connected to the network. With PROFIBUS this can
be 0 to 126. 127 is a broadcast address.
Software tool to observe the protocol traffic. Combi-Analyzers can also inspect
the signal quality.
Other term: Bus Monitor.
Example: ProfiTrace.
The primary bus cable. Most of the time only the control systems, ProfiHubs and
fiber optic couplers are connected to this cable. The field devices are connected
behind the ProfiHubs and fiber optic couplers.
The bit time Tbit is the time, which elapses during the transmission of one bit. It
depends on the baudrate and is calculated as follows Tbit = 1 (bit) / baudrate
(bps).
Examples:
12 Mbps --> Tbit = 83 ns
1.5 Mbps --> Tbit = 667 ns
Settings that define the timing behaviour on the bus. They are defined in the
master. Examples: Tslot, MaxTSDR.
Capacitance.
Digital Ground.
German Institute for Standardization (www.din.de).
DP-V0 is the basic stage of the PROFIBUS DP communication protocol. DP-V0
devices (master and slaves) perform the following basic functionalities:
- Cyclic exchange of I/O data between controlling and slave devices
- Device, Identifier (module) and Channel related Diagnosis
- Parameterization of DP-slaves
- Configuration of DP-slaves
DP-V1 is the first stage of extension of PROFIBUS DP after DP-V0. DP-V1 devices
shall comply with the following features:
- Device related diagnosis is replaced by status and alarms.
- The first three octets of the user parameterization data are now standardized
- Optionally these devices may support:
- Acyclic communication (MS1, MS2)
- If alarms are used, MS1 shall be supported
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