User manual

IEC61131 User and Reference Manual
April 22, 2008
466
SCADAPack
DNP Master
SCADAPack
DNP Outstation
Figure 0-1: Simple SCADAPack Master-Outstation DNP Network
An extension of a simple DNP Master and single outstation network, involves a SCADAPack DNP
Master connected to a number of outstations over a multi-drop communication channel. The DNP
Master may be configured to periodically poll each SCADAPack DNP Outstation for Class 0, 1, 2,
and 3 data objects and receive unsolicited responses from the outstations. The outstations may be
configured to report change event data to the master station using unsolicited responses.
The arrowed line between the master and outstations, in the diagram below, represents the
communication path connecting the stations. This communication path may be any multi-dropped
type that is supported by the controllers, such as leased line modem, dial-up modem and radio for
example.
SCADAPack
DNP Master
SCADAPack
DNP Outstation A
SCADAPack
DNP Outstation A
SCADAPack
DNP Outstation A
Figure 0-2: SCADAPack DNP Master and multi-dropped DNP Outstations
Note: The DNP Master feature is limited to a SCADAPack32, SCADAPack 350,
SCADAPack 330/334 and SCADASense 4203