Automation Control Flashcards
How do we represent a Normally Open Contact?
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How do we represent a Normally Closed Contact?
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What are the main rules of ladder programming?
- Inputs can be used in Series and in Parallel to form a connection
- Outputs (or Coils) can be used only in Parallel
- One input can be used multiple times in one program
- One output can’t be used multiple times in one program except in Set/Reset and Latch/Unlatch functions
- An Input Address can’t be used as an Output Address
- An Output Address can be used as an Input Address
How do we make an AND condition in Ladder Coding?
Placing terms in Series
How do we make an OR condition in Ladder Coding?
Placing terms in Parallel
How do we set in Ladder?
(S)
How do we reset in Ladder?
(R)
How does an On Delay Timer work?
A positive input is required for the desired time before there is an output
How does an Off Delay Timer work?
A positive output will continue to occur for the desired time period after the positive input has ended
How does a Pulse Timer work?
No matter how long the impulse is triggered for, we will have an output for a set time, and then it will occur again once the pulse is triggered again
What do we mean by Sampling?
Discretizing a signal in time
What do we mean by Quantization?
Discretizing the value of the signal
How does an Analogue to Digital Converter usually work?
The signal is usually first sampled, and then quantized
What is Annulment regarding Boolean Algebra?
a . 0 = 0
a + 1 = 1
This cancels the previous values
What are the two types of logic circuit, and how do we make the distinction?
Combinational Logic: The output is only depended on the present input values
Sequential Logic: The output depends on the present input values, but also the past/output or internal state values
