ABB AC 800M

About This User Manual Terminology
9ARD000014-600 A 15
Implicit messaging 
(I/O Messaging)
Also known as I/O messaging. Implicit Messages are
exchanged across I/O Connections with an associated
Connection ID. The Connection ID defines the meaning
of the data and establishes the regular/repeated
transport rate and the transport class. It can be point-to-
point or multicast and are used to transmit application
specific I/O data.
ISP Input Set as Predetermined. ISP values are preset
default values of channels, as seen by the application,
when communication between CI873 and I/O devices
break. ISP is set to the last good value if there is any
channel error.
I/O Scanner An I/O Scanner initiates implicit connections with I/O
adapter devices, that is, it is an I/O Client. A scanner is
typically the most complex type of EtherNet/IP device, as
it must deal with issues such as configuration of which
connections to make, and how to configure the adapter
device. Scanners also typically support initiating explicit
messages, that is, it is also an Explicit Message Client. A
programmable controller is an example of an I/O
scanner (used interchangeably with Scanner class).
LD 800DN LD 800DN is a linking device, which is used to connect
DeviceNet devices with the control level network.
Linking Device EtherNet/IP to DeviceNet gateway, referred to as LD
800DN in the Control Builder hardware tree.
O->T Originator to Target. (used to describe packets that are
sent from the originator to the target)
RPI
(Requested Packet
Interval)
The rate of packet transmission from one node to
another.
Scan List The list of DeviceNet devices that needs LD 800DN to
establish connection with.
Term/Acronym Description