Programmable Logic Controller
-2
votes
0answers
55 views
Power line communication in an industrial environment [closed]
I am trying to test the reliability of PLC modems (power line communication) in an industrial environment. This is will be the subject of my master degree work. This kind of technology would be very ...
0
votes
0answers
29 views
How to understand normally close hardware switch and normally open PLC switch combination?
I start to modify my company PLC program.
It is not easy for a new guy. They use normal close hardware with normal open PLC program switch and normal close hardware with normal open PLC program ...
1
vote
2answers
67 views
What does a PLC read if I have an unconnected input?
I know that I can test it, but I want to know whether there is any default ? Thanks
0
votes
1answer
89 views
How does a safety PLC work?
I have read the manual, but I am not sure how the omron safety PLC works.
I guess this safety PLC use Output Power Supply Output (21,22) to drive the output circuit, but why does it need (1,2) the ...
-5
votes
1answer
65 views
What is the name of the control system that is PC based PLC? [closed]
I heard people say that PLC can be replaced by computer based gate logic system and has been used in industries for many years. What is the name of that?
Thanks
12
votes
6answers
2k views
Why use PLC instead of microcontroller?
Why does everyone use PLCs in industrial environments, instead of a microcontroller based solution?
For a longer task, the PLC program is as complicated as a microcontroller program.
A ...
