Hi all
first of all i want to thanks every body for this excellent site that personally helped me to learn PLC i have interestin PLC i didn't go to university or college to learn i did it at home and from this site
thank you all and i hope that you accepet me as a member
if you think you know every thing in PLC answer these Questions test your self i personaly done these questions and iam not going to lie i didn't get 2 or 3 questions right, for some of you these questions going to be easy and for some hard and for other it's going to look familiar to them because i got these questions from some were
if you don't want to answer them please don't do this only for challengers
i hope you answer here so every one can enter small competition and see whos the best
well Queastions
PLC types Questions
Qs.1. Explain what programmable controller is and what it does ? (refering to input, output, an industrial computer and program executio)
Qs.2. Describe very simply the following three main types of programmable logic devices ? (in each device describe what they look like, give a typical number of inputs and outputs and one example application that each might be used:-
Qs.3. Give two examples of devices that are commonly used to provide inputs signals to PLCs and two examples of devices that are connected to the outputs ?
Qs.4. Three diffrenet software items, listed below, are neededto operate a PLC. Describle brifly what each of them does:-
Qs.5. Briefly describe the cable link and typical signals carried to/from :-
Qs.6. Describe briefly two types of communication links now used in bus and network type systems for PLCs, eg. Profibus and AS-interface. for each one:-
Thank you for your time
I forgot to add this i got the queastions form my cousin in England
first of all i want to thanks every body for this excellent site that personally helped me to learn PLC i have interestin PLC i didn't go to university or college to learn i did it at home and from this site
thank you all and i hope that you accepet me as a member
if you think you know every thing in PLC answer these Questions test your self i personaly done these questions and iam not going to lie i didn't get 2 or 3 questions right, for some of you these questions going to be easy and for some hard and for other it's going to look familiar to them because i got these questions from some were
if you don't want to answer them please don't do this only for challengers
i hope you answer here so every one can enter small competition and see whos the best
well Queastions
PLC types Questions
Qs.1. Explain what programmable controller is and what it does ? (refering to input, output, an industrial computer and program executio)
Qs.2. Describe very simply the following three main types of programmable logic devices ? (in each device describe what they look like, give a typical number of inputs and outputs and one example application that each might be used:-
- The small programmable relay.
- The self-contained medium capability PLC.
- The modular, or rack-mounted, expandable PLC.
Qs.3. Give two examples of devices that are commonly used to provide inputs signals to PLCs and two examples of devices that are connected to the outputs ?
- Describe simply what each device does.
- Give tyical voltage and currents produced by an input device under the different conditions that operate it.
- Give typical voltage and current values that operate an output device.
Qs.4. Three diffrenet software items, listed below, are neededto operate a PLC. Describle brifly what each of them does:-
- User program written by the engineer, eg. similar to ladder digram ( LADSIM )
- Development software, eg. similar to ( LADSIM ) usually running in a PC(not the PLC)and used when engineers develop user programs.
- The software ( monitor program ) that always runs in the background on the PLC.
Qs.5. Briefly describe the cable link and typical signals carried to/from :-
- An on/off sensor or output solenoid
- A fieldbus system, eg. profibus
Qs.6. Describe briefly two types of communication links now used in bus and network type systems for PLCs, eg. Profibus and AS-interface. for each one:-
- State what kind signals are transmitted, analogue or digital.
- If digital, state if data is transmitted in serial or parallel fashion.
- Describe simply the job that the links do, eg. involving PLC, digital info, sensor detect/non detect condition and instructions to an actuator.
- Describe simply what they look like, including simple descriptio of cable and connector/connection method in each case.
- State the length limitation of the link in each case.
Thank you for your time
I forgot to add this i got the queastions form my cousin in England
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