Profibus Dp-Configuration - GE MM300 Manual

PROFIBUS DP

Profibus DP-configuration

4–6
The Profibus-DP basic configuration has one DP master and one DP slave. In a typical bus
segment up to 32 stations can be connected (a repeater has to be used if more than 32
stations operate on a bus). The end nodes on a Profibus-DP network must be terminated to
avoid reflections on the bus line.
The Profibus bus address (MAC ID) of the MM300 slave, which has a range from 1 to 126,
can be set via the Profibus Address setting on the HMI from the Home > Setpnts > Cfg >
Comms page or via the EnerVista MM300 Setup software. Address 126 is used only for
commissioning purposes and should not be used to exchange user data.
The MM300 Motor Management System has autobaud support. The available baud rates
and other slave specific information needed for configuration are contained in the
"GEMU4D20.gse" file which is used by a network configuration program.
The MM300, as a DP slave, transfers fast process data to the DP master according to
master-slave principle. The MM300 Motor Management System is a modular device,
supporting up to 95 words of Input data and 1 word of Output (command) data.
Modules define a block size of Input and/or Output data to be read by the master, starting
from offset zero. During the network configuration session, the "95 Words In, 1 Word Out"
module can be selected in order to get all Input/Output data available in the MM300.
If the "95 Words In, 1 Word Out" module is not selected and a lower number of Input Data
bytes is desired, modules with varying sizes of Input data are also provided in the GSE file.
Adding modules in your Master configuration increases the size of the total block of data
(starting from address zero) that the Master will read, allowing customization of the Input
data size up to the maximum of 95 words.
The following diagram shows a possible DP Master configuration menu. In this example,
the full set of available MM300 input and output polled data ("95 Words In, 1 Word Out")
has been selected from the available modules in the GSE file. As the maximum has been
selected, no additional modules can be chosen:
Figure 4-3: Profibus configuration menu
The diagram below shows the input and output data read from the MM300 with the
configuration above
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 4: FIELDBUS INTERFACE