9.29
Date Code 20120126 Instruction Manual SEL-2032 Communications Processor
Protocols
Serial Distributed Network Protocol (Serial DNP3)
For point-to-point connections, we recommend that you use Unsolicited
Report-by-Exception as it provides the greatest communications efficiency
and data update performance. If, however, your master does not support
unsolicited data or you are using a multidrop system where other devices do
not have adequate DNP Link Busy Monitoring, use Polled Report-by-
Exception. If you wish to collect time-stamped event information, you must
use either Polled Report-by-Exception or Unsolicited Report-by-Exception to
collect Object Type 2 data (time-stamped binary events).
Device Profile
Document
As required by the DNP V3.00 Subset Definitions document, below is the
device profile.
Unsolicited
Report-by-Exception
The slave devices send
unsolicited event data to
the master and the
master occasionally
sends integrity polls for
static data.
Set CLASS to a non-zero
value, Set UNSOL_REP = Y,
Set NUM_EVENT and AGE_TX
according to how often you want
messages sent.
Quiescent The master never
polls and relies on
unsolicited reports only.
Set CLASS to a non-zero
value, Set UNSOL_REP = Y,
Set NUM_EVENT and AGE_TX
according to how often you want
messages sent.
Table 9.15 Data Access Methods (Sheet 2 of 2)
Data Retrieval Method Description Relevant SEL-2032 Settings
Table 9.16 SEL-2032 DNP3 Device Profile (Sheet 1 of 2)
Parameter Value
Vendor name Schweitzer Engineering Laboratories
Device name SEL-2032 Communications Processor
Highest DNP3 request level Level 2
Highest DNP3 response level Level 2
Device function Slave
Notable objects,
functions, and/or qualifiers supported
Supports enabling/disabling
of unsolicited reports on a class basis
Maximum data link frame
size transmitted/received (octets)
292
Maximum data link retries Configurable, range 0–15
Requires data link layer confirmation Configurable by setting
Maximum application fragment
size transmitted/received (octets)
2048
Maximum application layer retries None
Requires application layer confirmation When reporting Event Data
Data link confirm time-out Configurable
Complete application fragment time-out None
Application confirm time-out Configurable
Complete Application response time-out None
Executes control WRITE binary outputs Always
Executes control SELECT/OPERATE Always
Executes control DIRECT OPERATE Always
Courtesy of NationalSwitchgear.com