i am interested in installation and programming of plcs 10

[madhu]

i am interested in installation and programming of plcs

 

[umn]

Don't know to what extent you're proficient-<br>
<br>
The basic functionality of the PLC can be summarized as:<br>
- Read a set of inputs (Analog/ digital)<br>
- Start/ stop/ update/ check a set of internal timers<br>
- Process the inputs, timer conditions and previous outputs<br>
as per the logic programmed by the user, to arrive at a<br>
new set of outputs.<br>
<br>
The user can program the PLC using a PC OR plug-in programmer OR other similar ways.<br>
<br>
The inputs can be analog (with specific voltage & current ranges) or digital. For analog values, there will be an inbuilt ADC/DAC in the PLC.<br>
<br>
Another advantage is that most of the PLC's are modular. With the main processor unit, different I/O modules may be added as per your requirement. And in case of failure, it's easy to identify the defective module- you need to replace only that.This means, in a continuous production line, the down time can be minimized to a great extent.

 

[waltpozgay]

I'm not sure what you're looking for.<br>
<br>
Most PLC manufacturers provide installation and programming manuals with their products.<br>
<br>
Installation is generally pretty simple. Each input and output device will be connected to the PLC at a specific node, which the PLC will address. The most common problem here is how the common inputs are connected.<br>
When connecting inputs, the PLC is both the source and the load for each input signal. The common can either be + with respect to the input node or -. As long as all inputs are connected the same way, it generally doesn't matter.<br>
When connecting outputs, the output device is the load to the PLC, and polarity again is not generally important, as long as it is consistant.<br>
<br>
Programming a PLC is alot like programming in assembly language. The format used is usually "Ladder Logic" which will produce a program that resemble a relay logic diagram.<br>
<br>

 

[madhu]

Actually i need some literature on programming of micrologix plcs.can any body guide me in this aspect.also i have been working with allen bradley plc.i want to know about other manufacturers in this subject.

 

[umn]

I've some user manual material on micro-logix 1000 PLC's. Let me know your e-mal id, if you need that.<br>
<br>
I can be reached at umn@ieee.org

 

[sgkb15]

If you want to know and learn more about PLCs, then best way site is

http://www.plcs.net.

This site is one of the best available on the net with an online tutorial. Also it has an interactive Q&A BBS where you can post your questions and also try to answer some if you know.<br>
<br>
If you really want to learn PLC programming then a free PLC simulator is also available called as Prof. Bills simulator. More can be found on the site I mentioned above.

 

[silverdreem]

Hi there,<br><br>Maybe you can help me with my PLC simulation?<br>I am using Bytronic International's LADSIM program?<br>Any help would be useful, I am working on a <br>Drinks machine and Life &lt;Elevator&gt;<br><br>Please e-mail me <br><br><A HREF="mailto:testpilot@doctor.com">testpilot@doctor.com</A>

 

[kunalw]

The best way to study PLC is to go at its exclusive site<br><A HREF="

http://www.plcs.net"

TARGET="_new">

http://www.plcs.net</A><br>kunal

 

[sunil]

plcs.net is useful but it is very basic in nature.<br>if others know about more advanced tutorials on plcs please tell me.<br>thank you&nbsp;&nbsp;from <A HREF="mailto:sunilrathaur@usa.net">sunilrathaur@usa.net</A>

 

[Kieran9]

Hi There
On the subject of plcs and ladder logic - is there

1. A free ladder logic program available
2. A simulation type program available that can be tailored to application prior to purchasing equipment

I have used Allen Bradley slc500 (I Think) as a student where the Logic Prog is written in a DOS fired program and then downloaded onto the target system.. Is this still the way things are ??

3. Is distributed control possible with plcs ??

I have looked on the

http://www.plcs.net

 

[montejr]

Kieran9, to answer some of your questions,

As far as I know there are no free ladder logic programs, I believe each PLC has their own programming software. Some PLC software packages have a simulator option - I've used the Siemens S7-300 simulator and it is excellent (but expensive.

Finally what exactly do you mean by distributed control?

You may want to post these questions on another discussion site at:

http://www.thecontrolzone.com,

I've gotten some answers from this site.

 

[wimpy]

There is free programming software at (

http://www.hpeag.com)

this is for the Horner PLC's. The program is called cscape

 

[haythem]

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ýI am graduate from Faculty of Electronic Engineering. Department of Computer Science and Engineering, in May ýý1999. I am Work as Automation Engineering in Rolling Steel Company and I am interested with your products ýýplease can you send to me more Details about your Products.ý

 

[roliver]

Kieran9,
Referring to your #3 question; What is distributed control? If you are referring to adding more I/O drops through a distributed network off of one PLC's CPU, for control then basically you have two or more racks. In the first rack will be your Power Supply, CPU, various input &amp; output cards, or analog cards,etc, and a Distributed I/O Drop card that will link Rack 1 and its CPU to another rack that has a Power Supply, a Distributed I/O Drop card (to communicate with first rack), and other various input/output cards..etc for contolling more input/output points then you have available because of slot limitation on first rack. I hope this is what you may be asking about and helps you get an idea. Check with Modicon Quantum PLC by Schneider Electric for a reference.