Showing posts with label of. Show all posts
Showing posts with label of. Show all posts
Sunday, January 27, 2013
Programming example of the small PLC's Siemens LOGO!
Programmable Logic Controllers from the original of which was named PLC, are electronic, primarily circuits - devices with electrical inputs and outputs. We can say that it is a relatively small force computer programmed with its own programming languages.
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| LOGO! from SIEMENS |
The Telemecanique zelio of the group Schneider Electric is another, similar, popular small PLC.
It is ideal to start a familiarity with the PLC and have evolved into power and memory capacity making them ideal for many applications.
The demo of the software program called LOGO! Soft Comfort, is freely available and the only function that has cut is the communication between the PC and the hardware device LOGO! made with a special cable. With LOGO! Soft Comfort can each experiment and as he wants to plan the LOGO! in the screen of his computer at no cost.
Programming can be done from the small screen that has the LOGO! but cumbersome method.
The same data apply to zelio.
We can plan with two "languages" the microcontroller LOGO!.
In function block diagram (FBD), as shown in the example of the first image
or ladder diagram (LAD), as shown in second picture.
From the menu of LOGO! Soft Comfort can turn the program easily from one format to another
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| fbd |
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| lader program |
Despite
This example shows the implementation of the following logic operation:
{
((If you see a trend in both input 1 and input 2)
or voltage appears at the input 3)
and pressed the up arrow of the logo
Then it turned on the output 1.
}
The environment of LOGO! Soft Comfor has option to emulate the operation of the program, which is very useful for finding errors. From this screen modes the pictures are.
Bottom left in the images appear to be activated by clicking the mouse inputs "up arrow", I1 and I2.
With these conditions exit 1 is activated. The lamp Q1 in bottom left of the image is lit.
The blue line in the simulation indicates that it is logical 0 (no current passes) and the red line to logical 1 (current passes).
The output, depending on the model of the LOGO!, Can be activate contact relay or transistor.
For the name of the program elements used some letters and we can put comments to make it more understandable the circuit. The reviews are in fact very necessary, as an important piece of program documentation.
I come from the initial letter of the word INPUT .
B is the first letter of the word BLOCK.
To exit the letter Q is used as the O, the initial letter of the word OUTPUT is like 0 (zero) and is not used . The Q is what is more like the O so it was chosen.
The & is the symbol for logical AND.
The> = 1 is the symbol for the alternative or.
The exclamation point at the end of the word LOGO! is part of the trademark of Siemens
Wednesday, January 16, 2013
Example of OMRON CP1E PLC programming using CX programmer
The PLC of OMRON is generally consistent with many capabilities.It has many models with many variations that cover a variety of needs.
The main method is by programming with LADDER language , computer and program CX - programmer, series programs CX - one, sold separately.
DEMO version of the software is free for download and use.
A small model is the OMRON CP1E associated with the H / PC via a single USB cable from where the example of this suspension.
The 0.00 is the word 0 bit 0 and is always input while 100.01 is bit 1 of word 100 which is always output.
In the example the logical process tells to the PLC:
((if the input I 0.00 is 1 or the input I 0.02 is 0) and the input I 0.01 is 1 then the output Q 100.01 becomes 1)
(If input I 0.03 comes 1 the output Q 100.00 becomes restraint 1 (Set))
(If input I 0.04 comes 1 the output Q 100.00 is 0 (Reset))
Continue read[...]
The main method is by programming with LADDER language , computer and program CX - programmer, series programs CX - one, sold separately.
DEMO version of the software is free for download and use.
A small model is the OMRON CP1E associated with the H / PC via a single USB cable from where the example of this suspension.
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Simple example program for the Omron PLC CP1E with Ladder |
The 0.00 is the word 0 bit 0 and is always input while 100.01 is bit 1 of word 100 which is always output.
In the example the logical process tells to the PLC:
((if the input I 0.00 is 1 or the input I 0.02 is 0) and the input I 0.01 is 1 then the output Q 100.01 becomes 1)
(If input I 0.03 comes 1 the output Q 100.00 becomes restraint 1 (Set))
(If input I 0.04 comes 1 the output Q 100.00 is 0 (Reset))
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| end of the program |
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