Echelon ISI - Manual (Page 157)

155 ISI Programmer’s Guide
Term Definition
controller to specify the devices to be connected.
Domain Address
Server (DAS)
A device present in ISI-DA networks that does ISI management
tasks such as assigning a domain ID and monitoring and reporting
network size. An ISI-DA network may include multiple domain
address servers.
Domain Resource
Usage Message
(DRUM)
Periodic message containing the physical address (Neuron ID),
logical address (domain, subnet, and node ID), and part of the
program ID for a device.
Enrollment The process of creating a self-installed ISI connection.
Explicit message A message that is explicitly constructed by the application. The
message may be an application message, network management
message, network diagnostic message network variable message, or
a foreign-frame message. See also implicit message .
Forwarder A function that allows the default implementation of a function to
be called while still allowing for an application-specific
implementation.
Implicit message A message that is constructed by the 709.1 protocol engine within
an application. Only used for network variable messages.
ISI connection See connection .
ISI engine Part of the ISI library that implements most of the ISI protocol and
relays information back to the application through use of callback
functions.
ISI-S network A network that does not include a domain address server, or
contains any devices that are not ISI-DA compatible. ISI-S
networks are limited to 32 devices.
ISI-DA network A network that includes a domain address server and consists
solely of ISI-DA compatible devices. ISI-DA networks are limited
to 200 devices.
ISI-DAS protocol The protocol implemented by a domain address server.
Managed network A network that is managed by a network management tool, and is
therefore not self-installed.
Manual enrollment The process of creating an ISI connection requiring user interaction
with the devices to be connected.
Message Information sent from a source device to one or more destination
devices. In the 709.1 protocol, a message may be an application
message, network management message, network diagnostic
message, a network variable message, or a foreign-frame message.