Welcome to instrumentation tools
Open the app, Quizmeter. In the app, we have a PLC session
PLC true or false. So in the previous two videos, we have seen the level 1 and level 2
And today in this video, we are going to see the level 3
So let us click on level 3. We are going to face 10 questions related to the PLC
So the first question, functional block diagram in PLC supports the use of reusable custom
function blocks. So functional block diagram is one of the five languages that we use to write the PLC program
So functional block diagram actually allows the creation and utilization of custom reusable
functional block in PLC programming. So because of this, modularity and efficiency in developing and maintaining control algorithm
is more. So the answer to the question is true. It supports the reusable custom function blocks
Second question, in PLC system, I-O modules are responsible for interfacing between the
PLC processor and the physical input and output of the system. So a PLC, integrated type PLC will be having the inbuilt I-Os
But in the modular type PLC, we will be having the I-O modules
That is what we are calling that as I-O modules. So what is the role of I-O modules means as they have mentioned, it is used to make the
communication between the processor, that means our CPU and the physical inputs and outputs
So for the integrated module, you can directly connect the inputs to the CPU
But in the modular type of PLC, you need a support of extra modules that we call that
as I-O modules. You are going to connect the input to the module means that will be the input module
and output module, we will be connecting the output. So the answer to the question is true
We need the I-O modules are actually responsible for interfacing between the PLC processor
and physical inputs and outputs. So I am going with the answer true
Third question, a PLC's memory is volatile, meaning all data is lost when power is removed
So if a PLC memory is volatile, think about in a short flow
If a PLC memory is volatile, you are doing some process in the DB and there is a power
loss and all your data will get lost and once you turn on, again you will stop the process
No, right? It is not, you know, feasible, no? So a PLC will be having a volatile memory also, but what and all data we are going to
process, no, that will be storing in the non-volatile memory. So while PLC do have a volatile memory that loses data when power is removed, they also
contain a non-volatile memory where you are storing the user program and crucial data
Non-volatile memory retains information even when the power is lost, ensuring that the
PLC can resume its operation when the power is restored. So the answer to the question is PLC memory is volatile, meaning all data is lost when
power is removed. Actually, this is a false statement. So fourth question, analog I-O modules in PLC can only process binary signals
So we know what is binary, right? 0s and 1s and what they have given is analog I-O modules
Analog I-O modules will be having, you know, tendency to handle the continuous signals
That means that may be input of pressure, temperature, voltage, current kind of, it
will be dealing with all the continuous signals, not with the binary values
That means the, you know, digital inputs. So if you want to deal with the digital, I mean the binary signals, you need to go for
the digital I-O module. So the given statement is false. So fifth question, continuous function char is a graphical language allowing free placement
of functional blocks in PLCs. So the answer to the question is actually true
Why means, a CFC is a graphical language in PLC that allows free placement and connection
It provides flexibility in designing control algorithm without specific structural constraint. So the answer to the question is true
Move on to the next one. SFC, sequential functional char in PLC is limited to linear sequence and cannot represent
parallel or branching process. So sequential functional char is also one of the language in PLC
If it is constrained with only, you know, linear sequence and cannot be able to do the
parallel or branching process means, how come we can do the whole application using this SFC
It is conflicting, right? So in SFC also we can able to do a comprehensive way to describe complex control tasks and workflow
So the answer to the question is false because in SFC we can do all parallel and branching
processes also. So I am going with the answer false. So we have a seventh question
IL, instruction list is a PLC programming language suitable for programmers familiar
with low-level programming or machine language. So IL is a instruction list which actually is a low-level programming languages only
It resembles kind of assembly or machine language making it suitable for those familiar with
low-level programming and needing, you know, detailed control over logic. So the answer to the question is true
So we have a eighth question here. Heart-swapping refers to the ability to replace or add I-O modules in a PLC without shutting
down the system. So there is a term in a soft flow that is the heart-swapping
So what is heart-swapping you have to understand. So as I mentioned actually a heart-swapping refers to the ability to replace or add I-O
modules or other components in the PLC system without shutting down the entire system
So while you are having this option in the soft flow, this capability is valuable in
minimizing downtime during maintenance, replacement or system expansion, allowing changes to be
made without disturbing ongoing processes. So you have some application running in the soft flow
In the time if you want to do some repair or if you want to do, you know, change or
add the I-O module keys, no need to surround the whole system
You can do the heart-swapping. So the answer to the question is true
So we have the ninth one here. SFC, sequential function chart is a PLC programming language suitable for modeling sequential processes
So yes, SFC is a graphical programming language specifically designed to model sequential process
It represents the control logic as a series of steps and transitions providing a clear
and structured way to design, document and maintain complex sequences. SFC is particularly useful in applications where order and timing of operations are critical
such as in batch processing. So the answer to the question is yes, true
So here comes the last question. Structured text in PLCs can only be used for simple logical operations and cannot handle
complex algorithms. This is similar to one of the questions you have seen before, right
So obviously, SFC is one of the languages for the programming in the PLC
If it is handling only a simple logic operation, how come we can implement, you know, structured
text in the whole project? So the answer to the question is false
So we are done with all 10 questions. Let's move on to the result page
Yes. So we have cracked all 10 questions. So you can review the answers
We will give all, you know, description for all the questions, why this is true and why
that is false kind of. If you have a doubt, you can go and review the answers
And also you can move to the next level from here and there is an option to share your
scores with your friends. So those who are interested in these kinds of questions can also attend along with you
And I will meet you in the next session with another interesting level
Thank you