User manual

IEC61131 User and Reference Manual
April 22, 2008
465
For additional information on the any of the dialogs referenced in the above exercise, refer to the
DNP Configuration Menu Reference.
SCADAPack DNP Master
DNP master modes currently apply only to the SCADAPack 32, SCADAPack 350, SCADAPack
330 and SCADASense 4203 controllers.
As a master, a SCADAPack controller can be a regular Master or Mimic master.
SCADAPack DNP Master Concepts
A DNP Master station inherits all the characteristics of a DNP Outstation. In addition, a DNP
Master station is able to:
 Poll DNP outstations for static (Class 0) data and Class 1, 2 and 3 event data.
 Accept and process unsolicited response messages from polled outstations.
This configuration of a DNP Master (Client) and DNP Outstation (Server) forms the basis of a DNP3
Network. The SCADAPack DNP Master may be configured to periodically poll a SCADAPack
DNP Outstation for Class 0, 1, 2, and 3 data objects and receive unsolicited responses from the
outstation. The outstation may be configured to report change event data to the master station using
unsolicited responses.
The arrowed line between the master and outstation in the diagram below represents a
communication path connecting the two stations. This communication medium may be any type that
is supported by both controllers, such as direct serial, leased line modem, dial-up modem and radio
for example.