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Controller
Hardware and Accessories Setup and Utility
Terminology .4
Upon entering the world of computerized control, there are several widely used terms with
which you may not be familiar. The following is a mini control glossary:
Input:
1.
(In general) Any information that is fed into a computerized device.
2.
A point on the controller where information gathered from the surroundings is
connected.
3.
(Discrete/Digital) input – An input capable of reading two different positions: a
closed contact and an open contact.
4.
(Analog) input - An input that reads a value of electric current, voltage, resistance
or frequency, in a pre-defined range. An electric value represents the real units
read by the sensor, which the control software interprets and act on. Sometimes
this input is referred to in short as
Sensors.
Output:
1.
(In general) the “production” of a computerized device.
2.
The point on the controller where the operated device must be connected.
3.
(Relay) Output – the controller’s internal closing contact between 2 points.
N.O:
Normally open – refers to the status of an Output when the program is idle to it.
N.O. output will be in opened contact (no contact) in the case of relay, or not
powered in the case of Triac output.
N.C:
Normally closed – refers to the status of an Output when the program is idle to it.
N.C. output will be in closed contact (no contact) in case of relay, or powered in
the case of Triac output.
PLC:
1.
Programmable Logic Controller – an electronic machine designed to run a
program and operate external machines in accordance with the program.
2.
Hereby: The program that operates the controller.
Parameter:
a cell (location) in the controller’s memory allocated for the use of a
particular user setting.
Set:
1.
Define a value for a parameter.
2.
(Output) Turn an output to ON position. Activate an output.
3.
(Timer) Cause the timer to start counting
Reset:
1.
Initialize a parameter. Setting a zero value for the parameter.
2.
(Output) Turn an output to OFF position. Deactivate an output.
3.
(Timer) terminate the timer’s counting.
Summary of Contents for Galileo
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