EDS-508A/505A Series User’s Manual
Featured Functions
3-13
IEEE 1588 PTP
The following information is taken from the NIST website at http://ieee1588.nist.gov/intro.htm:
Time measurement can be accomplished using the IEEE Standard for a Precision Clock
Synchronization Protocol for Networked Measurement and Control Systems (IEEE 1588-2008) to
synchronize real-time clocks incorporated within each component of the electrical power system
for power automation applications.
IEEE 1588, which was published in November 2002, expands the performance capabilities of
Ethernet networks to control systems that operate over a communication network. In recent years
an increasing number of electrical power systems have been using a more distributed architecture
with network technologies that have less stringent timing specifications. IEEE 1588 generates a
master-slave relationship between the clocks, and enforces the specific timing requirements in
such power systems. All devices ultimately get their time from a clock known as the grandmaster
clock. In its basic form, the protocol is intended to be administration free.
Turbo Ring DIP Switches
The
Turbo Ring DIP Switch
page allows users to disable the four DIP switches located on the
EDS’s outer casing. When enabled, the DIP switches can be used to configure basic settings for
either the “Turbo Ring” protocol or “Turbo Ring V2” protocol. A complete description of the
settings is given below.
NOTE
The proprietary “Turbo Ring” protocol (recovery time < 300 ms) was developed by Moxa in
2003 to provide better network reliability and faster recovery time for redundant ring topologies.
The “Turbo Ring V2” protocol (recovery time < 20 ms), which was released in 2007, supports
additional redundant ring architectures.
In this manual, we use the terminology
“Turbo Ring” ring
and
“Turbo Ring V2” ring
to
differentiate between rings configured for one or the other of these protocols.
For a detailed description of “Turbo Ring” and “Turbo Ring V2,” please refer to the
Using
Communication Redundancy
section later in this chapter.
How to Enable or Disable the Turbo Ring DIP Switches
