User manual

IEC61131 User and Reference Manual
April 22, 2008
478
Change event data in the form of unsolicited responses from the outstations are routed directly to the
DNP SCADA Host, by the SCADAPack DNP router.
A DNP Router is different from a Mimic in that a router forwards all messages are directly to the
outstations, whereas the mimic responds to some messages on behalf of the outstations. Therefore,
both operation modes have the advantage of delegating the task of DNP Routing of multiple
outstations to this intermediate unit. The SCADAPack DNP router handles all communications
paths to outstations, including such tasks as dial-up radio communication. In contrast to Mimic
mode, however, the SCADA Host system still has to handle the long delays and high error rates that
may be present on the communications links to the outstations.
Note: Mimic Master and Routing are incompatible modes that should never be used
together.
How to Configure a SCADAPack DNP Router
In this exercise, we will configure a SCADAPack 32 controller to route DNP messages received
from DNP Master 32001 on its Ethernet port, out through com2. This message is destined for
outstation 20. .This exercise assumes a valid Ethernet connection between your PC or laptop and the
SCADAPack 32.
After this exercise, you should be able to:
 Configure DNP/TCP on an Ethernet port
 Configure a SCADAPack DNP Router to route messages from a SCADA DNP Host to an
outstation.
Tasks to Complete
1. Enable the DNP protocol communication on the communication interfaces involved in routing.
2. Enable routing on the communication interface.
3. Setup the forward and return entries in the DNP routing table.
Configuration Steps
1. From the Controller menu, click on Serial Ports.
2. In the Controller Serial Ports dialog, set the Protocol on COM2 to DNP.
3. In the Controller Serial Ports dialog, Enable Routing.
4. The completed dialog should look like this: