Parameter assignment / addressing
5.3 Configuring PROFIBUS DP
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
121
5.3 Configuring PROFIBUS DP
5.3.1 General information about communication via PROFIBUS DP
Definition of PROFIBUS DP
PROFIBUS DP is an international, open field bus standard specified in the European field
bus Standard EN 50170 Part 2. PROFIBUS DP is optimized for high-speed, time-sensitive
data transfer at field level.
Components communicating by means of PROFIBUS DP are classified as master or slave
components.
● Master (active bus node):
Components that represent a master on the bus define data transfer along the bus, and
are therefore known as active bus nodes.
Masters components are divided into two classes:
– DP master class 1 (DPMC1):
Central master devices are thus designated, which exchange information with the
slaves in specified message cycles.
Examples: SIMOTION D445-2 DP/PN, C240, P350, SIMATIC S7, etc.
– DP master class 2 (DPMC2):
These are devices for configuration, commissioning, and operator control and
monitoring while the bus is in operation.
Examples: Programming devices, operator control/monitoring devices
● Slaves (passive bus nodes):
These devices may only receive, acknowledge and transfer messages to a master when
so requested.
Examples: SINAMICS drives, I/O modules
Functions on PROFIBUS DP
The functional scope can differ between DP masters and DP slaves. The functional scope is
different for DP-V0, DP-V1 and DP-V2.
These functions on the PROFIBUS DP are characterized by:
● Configurable, equidistant, isochronous PROFIBUS DP cycle
● Synchronization of slaves by the master by means of a global control message frame in
each cycle clock
● Independent maintenance of the isochronous cycle clock by the slaves in the event of a
short-term communication failure.
Additional references
You will find additional information about PROFIBUS DP in the
SIMOTION Communication
System Manual.
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