Master/Slave Communication Phases; Module Internal Database - ProSoft Technology ProLinx PDPM Protocol Manual

PDPM ♦ ProLinx Gateway
PROFIBUS DP Master
2.4

Master/Slave Communication Phases

The communication between the Master and the slaves takes place in the
following phases:

Parameterization and configuration phase

Usable data transfer phase
Before a DP slave can be integrated into the usable data transfer phase, the
parameterization and configuration phase runs a device identification test that
verifies that the planned configuration matches the actual device configuration for
each slave in the PROFIBUS network. The test verifies that:

The device is actually there

It is the right type of device

The station address set on the device matches the station address in the bus
configuration

The formats, telegram length information, and bus parameters are correct
and

The number of configured inputs and outputs is correct
2.5

Module Internal Database

The internal database is central to the functionality of the module. This database
is shared between all the ports on the module and is used as a conduit to pass
information from one device on one network to one or more devices on another
network. This permits data from devices on one communication port/network to
be viewed and controlled by devices on another port/network. In addition to data
from the master port, status and error information generated by the module can
also be mapped into the internal database.
ProSoft Technology, Inc.
June 24, 2013
ProLinx
Communication
Gateways
Internal
Database
Register range
0
Input
Image
Data
255
300
Output
Image
Other
Data
ProLinx
Protocol
555
Driver
556
PROFIBUS
Master
Status &
User Data
3999
Functional Overview
Protocol Manual
PROFIBUS
Master
Driver
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