PACSystems™ RX3i DNP3 Outstation User Manual
Section 1
GFK-3103B
June 2020
Introduction
3
Object
A generic term used for referring to a collection of data points, or a single data point, on a DNP
device. An object can have a specific action on an Outstation and all objects are defined in the
DNP3 Specification.
Outstation
DNP3 Slave communicating with the DNP3 Master
PME
PAC Machine Edition
–
used to configure, program and monitor RX3i Systems.
Slave
DNP3 Outstation communicating with the Master
SOE
Sequence of Events: a generic term used to describe a mechanism that can detect data
change, then time-stamping each change for the purpose of establishing the sequence in
which the changes were detected.
TCP/IP
The Transmission Control Protocol (TCP) is one of the core protocols of the Internet Protocol
suite (IP), and is so common that the entire suite is often called TCP/IP. TCP provides reliable,
ordered and error-checked delivery of a stream of octets between programs running on
computers connected to a local area network, intranet or the public Internet. It resides at the
transport layer.
Variance
A specification sub-group of Group that typically refers to a format of the data, or a specific
sub-command to an action, as defined in the DNP3 Specification. Variance many times is a
micro sub-category of Object and is not unique when describing Objects and Groups.