Step 5 - Transmission Of The Configuration To The Controller (S7 Plc); Commissioning Via The Profibus Dp; General Information On The Profibus Implementation Of The Ma 204; Communication Profile - Leuze electronic MA 204i Technical Description

Commissioning and configuration
12.3.5 Step 5 – Transmission of the configuration to the controller (S7 PLC)
After correct transmission to the controller (S7 PLC), the PLC automatically carries out the
following activities:
• Check device names
• Establishment of a connection between the controller and configured
PROFIBUS devices
• Cyclical data exchange
12.4

Commissioning via the PROFIBUS DP

12.5 General information on the PROFIBUS implementation of the
MA 204i

12.5.1 Communication profile

The communication profile defines how participants serially transmit their data via the
transmission medium. The MA
systems and Decentral Periphery -> PROFIBUS DP.
DP communication profile
The PROFIBUS DP communication profile is designed for efficient data exchange on the
field level. Data exchange with the decentral devices occurs primarily cyclically. The neces-
sary communication functions are defined in the DP base functions. The DP optionally offers
acyclic communication services as well. These are used for configuring, operating,
observing and alarm handling.
In order to be able to perform data exchange, services are defined which PROFIBUS DP
differentiates between on the basis of the data access points transmitted in the telegram
header.
The MA 204i

12.5.2 Bus-access protocol

The PROFIBUS communication profiles (DP,FMS) use a uniform bus-access process. It is
implemented by layer 2 of the OSI model. The bus-access control (MAC) defines the process
for specifying the point in time at which a network device can transmit data. It must ensure
that no more than one participant has permission to transmit at any given time. The
PROFIBUS bus-access process includes the token-passing process and the master-slave
process.
64
204i
profile is based on the PROFIBUS profile for identification systems.
supports the communication profile for automation
MA 204i Leuze electronic