Horner APG SmartStack I/O HE800PBS600/HEPBS600 - Manual (Page 40)

DP Master
MAN0575-04-EN
PAGE 40 of 97
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Profibus Modules User Manual
EO 09-0009
The storage format determines how the data words are laid down in the process image. For the
Word data type it is possible to choose high/low (big Endian) value Byte or low/high value Byte
(little Endian).
Handshake of the process data
These various types are used for setting the handshake of the process data of the Master. The
choice of used type is important for the correct data exchange between the application program
and the device. The chosen handshake of the process data must be supported by the application
program. For all Horner modules select the buffered, host controlled handshake.
Hardware parameter
This parameter displays the size of the dual-port memory. The value enlarges or reduces the
permissible address area for the process data addresses.
For the Horner Profibus master the size of the dual-port memory is 8K.
For the Horner DP Slave the size of the dual-port memory is 2K.
6.2 Group
Membership
After the Master has been assigned, the Slaves can be assigned to up to eight different groups.
These groups can then be assigned here. Choose the Settings > Group membership menu.
Choose the group that is to support the DP-Freeze and DP-Sync commands.
Figure 17: Settings > Group Membership (1)
In the Group Membership, the Slaves can be assigned to the groups with the desired characteristics.
The table shows all configured Slave devices from the main editor window. Here it is possible to
select which of up to eight possible groups the Slave is assigned. The selected group membership is
transferred to the Slaves during their start-up sequence. The group membership acts as a filter for
the Sync and Freeze global commands. These are output as Broadcast telegrams in order to
synchronize the input and output data of several Slaves. Only those Slaves in whose group these
commands have been released react to it.