learn about plc

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chen

New member
Hi everybody!
I am new in this forum..and I need your help
I am trying to learn how to use a plc but it is very hard!!!
Can enybody tell me if there is something on the internet that can help me?
Or does enybody know if in Little Rock Arkansas is possible to find some courses about plc?
Thank you :smile:
 
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Chenley

Member
Location
Western KY
You could check your local university or colleges and see if they have anything. I know the University in here has about give classes dealing with just industrial controls.
 
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DBack Elec

Member
Location
AZ
kspifldorf said:
There are also Q n A Forums like PLCs.net. Be warned if you've been hard wiring long, it pretty much goes out the window when your programming ladder logic. Good Luck.
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This is true. I took a PLC course last year and everything seemed backwards. Instructor was good though. www.AmericanTrainco.com
 
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masterelect1

Senior Member
Location
Baltimore
PLC advice

PLC advice

Forget everything you think you know about hard wire control.

The word "logic" is key. I/O racks with associated internal bits, timers, counters as well as inputs and outputs. I/O, can be either AC or DC,
sinking or sourcing.

Normally open and normally closed are not what you think they are.

This is a very difficult subject to learn on your own especially if you have been doing hard wire motor control for a long time. Take courses in person. Allen-Bradley has very good seminars available but $$$.
 
mikeames

mikeames

Senior Member
Location
Gaithersburg MD
Occupation
Teacher - Master Electrician - 2017 NEC
When I learned we had old PLCS, and motor controls mounted on a board. Every terminal on the starters, start stops/ jog switched etc.... had banana plugs on them. The instructor gave us a scenario and we had to wire it, and program it. It worked best because it was all close, hands on, and easy.
 
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crossman

Senior Member
Location
Southeast Texas
masterelect1 said:
Forget everything you think you know about hard wire control.

Normally open and normally closed are not what you think they are.

This is a very difficult subject to learn on your own especially if you have been doing hard wire motor control for a long time.
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I would be interested to hear some more opinions on this line of thought.

To me, the more you know about hard-wired relay and motor control logic, the better off you are when trying to learn PCs. As for NO and NC contacts: If you consider each input terminal of a discrete input card to be a coil of a relay, the NO and NC work exactly as advertised in relay logic.

Of course, if you are referring to AB's XIC and XIO, well yeah, I chunk that crap out the window!
 
hockeyoligist2

hockeyoligist2

Senior Member
Location
close to greenville sc
I picked it up pretty quick. But I was thrown in the middle, had to sink or swim. First time I ever touched one was a 2am call in. I had a guy on the phone, two hundred miles away. The old hand held programmer (1986). He talked me through it that night. The next few days I read the handbook and I was up and going. Later I took short courses from Allen-Bradley and Siemens (company paid). Some of the guys I work with still struggle with it. But you can learn it if you apply yourself.

Edit to add Ditto on, "To me, the more you know about hard-wired relay and motor control logic, the better off you are when trying to learn PCs. As for NO and NC contacts: If you consider each input terminal of a discrete input card to be a coil of a relay, the NO and NC work exactly as advertised in relay logic."



Good Luck!
 
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