Rockwell Automation 1766-L32AWA, Руководство пользователя

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298 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Glossary
EMI
Electromagnetic interference.
encoder
1) A rotary device that transmits position information.
2) A device that transmits a fixed number of pulses for each revolution.
executing mode
Any run or test mode.
expansion I/O
Expansion I/O is I/O that is connected to the controller via a bus or cable.
MicroLogix 1400 controllers use Bulletin 1762 expansion I/O.
false
The status of an instruction that does not provide a continuous logical path on
a ladder rung.
FIFO (First-In-First-Out)
The order that data is entered into and retrieved from a file.
file
A collection of information organized into one group.
full-duplex
A bidirectional mode of communication where data may be transmitted and
received simultaneously (contrast with half-duplex).
half-duplex
A communication link in which data transmission is limited to one direction at
a time.
hard disk
A storage area in a personal computer that may be used to save processor files
and reports for future use.
high byte
Bits 8…15 of a word.
input device
A device, such as a push button or a switch, that supplies signals to the input
circuits of the controller.
inrush current
The temporary surge current produced when a device or circuit is initially
energized.
instruction
A mnemonic and data address defining an operation to be performed by the
processor. A rung in a program consists of a set of input and output
instructions. The input instructions are evaluated by the controller as being
true or false. In turn, the controller sets the output instructions to true or false.
instruction set
The set of general purpose instructions available with a given controller.
I/O (Inputs and Outputs)
Consists of input and output devices that provide and/or receive data from the
controller.
jump
Change in normal sequence of program execution, by executing an instruction
that alters the program counter (sometimes called a branch). In ladder
programs a JUMP (JMP) instruction causes execution to jump to a labeled
rung.
ladder logic
A program written in a format resembling a ladder-like diagram. The program
is used by a programmable controller to control devices.
least significant bit (LSB)
The digit (or bit) in a binary word (code) that carries the smallest value of
weight.
LED (Light Emitting Diode)
Used as status indicator for processor functions and inputs and outputs.
LIFO (Last-In-First-Out)
The order that data is entered into and retrieved from a file.
low byte
Bits 0…7 of a word.
logic
A process of solving complex problems through the repeated use of simple
functions that can be either true or false. General term for digital circuits and