Glossary - Allen-Bradley 1747-SN User Manual

Glossary

The following terms are used throughout this manual. Refer to the
Allen-Bradley Industrial Automation Glossary, Publication Number
AG-7.1, for a complete guide to Allen-Bradley technical terms.
Adapter Any physical device that is a slave on the RIO link.
Adapter Image That portion of the scanner image assigned to an
individual adapter.
ASB Module The Catalog Number 1747-ASB, 1771-ASB, or
1794 - ASB Remote I/O Adapter Module. The ASB module is an
adapter.
ASB Module Chassis
module. This includes the remote chassis and (if installed) two
remote expansion chassis when using the 1747-ASB.
Block Transfer (BT)
Block Transfer Read (BTR)
when a remote device transfers data to the SLC processor.
Block Transfer Write (BTW)
occurs when the SLC processor transfers data to a remote device.
Complementary I/O
I/O usage by pairing up I/O data from a primary and complementary
chassis.
Discrete I/O An input or output device that has corresponding bit
locations in the scanner's input or output file.
Discrete I/O Module
two-state (ON/OFF) devices.
Extended Node Capability
an 82 Ohm termination resistor at both ends of the RIO link for all
baud rates. This functionality also allows for up to 32 adapters to be
connected to the RIO link.
G file The SLC file used to configure the scanner. You enter
configuration information into this file during SLC processor
programming. This file is loaded to the scanner by the SLC
processor upon entering run mode.
The chassis directly controlled by the ASB
See RIO Block Transfer.
A form of block transfer that occurs
A form of block transfer that
Functionality that allows you to maximize
An I/O module used to sense or control
Functionality that allows you to use
Publication 1747 6.6 - July 1996
Glossary