User manual

105G Wireless Gateway User Manual
Elpro_man_105g_1.18.doc Page 90
Depending on the particular slave, Manufacturer Specific Data may also apply to an I/O module.
This data is a string of hexadecimal bytes, the meanings of which (if applicable) are device
specific and should be detailed in the documentation for the particular device.
Master Properties
The Profibus master 105G has
some configurable properties
that affect the entire Profibus
network. These properties can
be accessed by double clicking
the master icon in the network
busview, or right-clicking the
icon and choosing properties.
Profibus Tab
The Address parameter
specifies the actual Profibus
address of the Profibus master
(default = 0). Only available
addresses are listed and can be
selected as new address. The
serial baud rate for the entire
Profibus network is selected –
this is the baud rate that will be
used by the master and
therefore must also be
supported by all slave devices
on the network. Most slaves
will support auto baud rate detect, but it should be ensured that any slave on the network
supports the configured baud rate.
The Profile parameter controls the assignment of Bus Parameters for the Profibus network. In
the single master (default) profile, the bus parameters are calculated automatically by
configuration software and are optimized for speed – no other masters may be connected to the
network. The User Defined profile allows the bus parameters to be manually configured for
special network configurations and should only be used if the user is familiar with the individual
Profibus parameters (see Bus Parameters Tab below).
The storage format determines if word values are stored in big Endean (Motorola – most
significant byte has lowest address) or little Endean (Intel – Least significant byte has lowest
address) format.
Group Properties Tab
A DP master can send the SYNC and/or FREEZE control commands simultaneously to a group
of slaves for synchronization purposes. Therefore the slaves must be assigned to Sync/Freeze -
groups. Up to 8 groups may be configured as SYNC and/or FREEZE groups. Any slaves that are
configured to belong to a particular group (via that slave’s module properties|group assignment