Glossary of T
erms
29
Glossary of Terms
The following definitions apply to terms as they are use in
this manual, and have been worded for ease of
understanding. They may differ in detail to definitions
found elsewhere.
Address
The unique number given to each
instrument on the network that enables
the PC to transmit individual instructions,
and receive individual data from it.
Application
In this manual it defines the
application of
an instrument or group of instruments to
control temperatures or other variables
on a machine or process.
Application file
The stored settings of all of the
instruments on a machine or process.
Baud
Serial communication consists of a stream
of on/off signals called bits. Baud rate is a
measure of the speed of communications
in bits/second.
Bus
The electrical connection linking together
the instruments and the PC.
Charting
Placing logged readings on a graph
format to form a continuous trace of
readings where the vertical or Y axis
measures the magnitude of the reading
and the horizontal or X axis measures
elapsed time.
Cloning
Copying settings or groups of settings
from one instrument to another.
Comms
Abbreviation of serial communications.
Daisy chain
The method of connecting instruments
together.
Data format
Defines the structure of the message.
Functions
The main features available in the
controller.
Icon
Small picture on a PC screen that
describes a CALCOMMS function that
can be clicked on to open or close the
function.
Level
The instruments' functions are grouped
on five levels of adjustments for ease of
use and protection.
Logging
Datalogging; Recording readings against
time and or date, into a file.
Modbus
Generic name given to the format
(protocol) that defines the structure of
the coherent groups of signals in serial
communications.
Multi drop
When several instruments are connected
together on a network using RS 485
standard.
Options
The choice of settings for the Functions.
Password protect
The arrangement that enables the user
to lock the system settings against
unauthorised adjustment with the use of
a word or code.
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