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Publication 1747-UM013B-EN-P - January 2005
Glossary
2
Extended Node Capability
Functionality that allows you to use 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.
Inhibit
A function by which the scanner stops communicating with a logical
device. The logical device will consider itself inhibited if it does not
receive communications from the scanner within a certain period of
time.
Input file
The scanner’s input image file that is updated during the SLC
processor input scan.
Local Expansion Chassis
A chassis that is connected to a local SLC chassis using a 1747-C9 (91.4
cm [36 in.]) or 1747-C7 (15.2 cm [6 in.]) cable.
Local SLC Chassis
The chassis that contains the SLC processor and scanner.
Logical Device
Any portion of a logical rack that is assigned to a single adapter.
Adapters may appear as more than one logical device.
Logical Group
A logical group consists of one input and one output word within a
logical rack. A word consists of 16 bits, each bit represents one
terminal on a discrete I/O module.
Logical Rack
A fixed section of the scanner image comprised of eight input image
words and eight output image words.
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