ALSPA PROFIBUS Field Bus Coupler
5. PROFIBUS-DP Protocol
(09/06)
Technical Manual
Page 5-3
The type 1 PPO contains 4 words of PKW and 2 words of PZD
data, the type 3 PPO only contains 2 words of PZD data. For
applications that only require up to 2 references and/or monitor
words, less PROFIBUS network communication bandwidth will be
used. This may be an important consideration on a slow Baud rate
network with a large number of nodes.
The type 2 PPO contains 4 words of PKW and 6 words of PZD
data, the type 4 PPO only contains 6 words of PZD data. It is the
PZD block that is used to transfer the references and monitored
values.
The type 5 PPO will allow up to 10 references and/or monitor
words. This setting will consume the most PROFIBUS network
bandwidth and will additionally impose a slight increase in drive
workload.
It is recommended that the smallest PPO size be selected to meet
the needs of the application.
5.3
Configuring a PROFIBUS-DP Master
The PROFIBUS board is a slave device on the PROFIBUS network.
The board is supplied with a disk containing a GSD file that contains
details of the PROFIBUS board and the services it provides. The
GSD file is required when configuring the master to talk to the
module.
Use the correct GSD file for the PROFIBUS board used!
For MVS3007-4001 use Mv3_2002.gsd
For MVS3007-4002 use Alst2002.gsd
Appendix D provides some examples of configuring ALSPA C80-35
and its PROFIBUS-DP master.
