All Questions
Tagged with plc control-system
9
questions
0
votes
4
answers
115
views
Connecting every other DIN terminal to each other
I am building a custom panel. My output DIN terminals are supposed to be in this order: Power, Ground, Power, Ground, Power, Ground.... I cannot find a proper way (jumpers or bars) to connect them. ...
- 101
1
vote
1
answer
95
views
How does deceleration work on a servo drive?
I'm confused by the fact that PLCopen MC-blocks used to control servo drives from a PLC have separate acceleration and deceleration parameter. For instance, MC_MoveAbsolute.
I don't understand what ...
0
votes
0
answers
80
views
Industrial Oven Control
I'm working on upgrading an ancient oven that we bought second hand, which came with almost zero documentation.
I have identified two fans one is exhaust fan and the other is a circulation fan.
Is it ...
- 1
1
vote
1
answer
153
views
What is the difference between these two ladder logic diagrams?
First ladder logic diagram:
Second ladder logic diagram:
I am trying to implement a toggle switch. On the rising edge of "Change", it should toggle "ToggleThis".
I thought the ...
- 447
0
votes
1
answer
132
views
Regarding PLC and several input/ output modules
I have to use more than 40 servo motors and 20+ load cells using PLC. But the problem is that I have to use many I/o modules ( that is costly and hectic). Can I reduce the no of I/o modules by any ...
0
votes
1
answer
120
views
STEP7 MICROWIN PLC Ladder Diagram
I draw like the first figure in the program, but when I save the program it automatically becomes the second shape. Do the two mean the same thing?
- 3
6
votes
5
answers
12k
views
Should cable shields be connected to earth ground, or to power supply negative?
I'm working on a PLC cabinet, and I'm wondering whether I should hook cable shields to earth ground, or to the power supply negative.
I checked and the power supply DC output is isolated. There's no ...
- 7,119
-1
votes
3
answers
3k
views
interchangeable operation of two electric motors without PLC
I have two motors that drive an air compressor. I have a pressure switch to turn the motors on/off.
The sequence I want is:
when pressure switch turns ON - motor 1 starts,
when pressure switch turns ...
- 101
4
votes
1
answer
273
views
When is a programmable logical controller the best choice? [duplicate]
I am studying PLCs as a part of my Elements of Industrial Automation class. Trouble is, I can't imagine why would anyone use such a thing.
For complex tasks, microcontrollers are available. The vast ...
- 3,143