Trimjohan

Novice question...IR internal relay adress in ladder diagrams

10 posts in this topic

Posted (edited)

Hi! 

Im used to C and C++

but ladder system is new to me.

When I look at a ladder diagram If i want to use an output or input that is for example the adress IR 0012, how is that presented in the ladder diagram?

I can se a value, for example 53.11 or something like that in an existing program. I read a couple of manuals, searched internet, but I dont get it. How do I know which real adress it is referred to?

 

Thanks!

 

 

Edited by Trimjohan

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Posted (edited)

Wrong reference

Edited by Jay Anthony
Wrong reference
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Trimjohan,

Welcome to the forum.

If you can tell us which plc part number you are using, that will help.

We will need to look at the memory map for your plc to be able to answer your question.

gtsuport

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10 hours ago, gtsuport said:

Trimjohan,

Welcome to the forum.

If you can tell us which plc part number you are using, that will help.

We will need to look at the memory map for your plc to be able to answer your question.

gtsuport

Hi!  Thank you! It is an old Omron sysmac c40h

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Posted (edited)

8 hours ago, gclshortt said:

https://accautomation.ca/omron-cp1h-numbering-systems-and-addressing/
The above will explain the numbering systems in the Omron CP1H series. This would be similar to all of the PLC's in this CP1 Series.

Here is a link to the entire CP1H Series.
https://accautomation.ca/series/omron-plc-cp1h-series/

Hope this helps you out.
Regards,
Garry

Hi! Thanks! This is the most informative manual i have seen so far!

Edited by Trimjohan

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Posted (edited)

Here is an example. How do I find out which plc input or output I am dealing with, in the ladder diagram?

PLC is an Omron sysmac C40H

Thank you!

myladder2.jpg

Edited by Trimjohan

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Posted (edited)

Those are internal relay bits.  There should be a 53.11 coil in the program.

Yes, the normally closed 53.12 is linked to the coil.

Attached is the Memory Map for the C__H series.

Here is a link to the Operation Manual.

C_H Operation Manual

C_H_Memory_Map.pdf

Edited by gtsuport
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8 hours ago, gtsuport said:

Those are internal relay bits.  There should be a 53.11 coil in the program.

Yes, the normally closed 53.12 is linked to the coil.

Attached is the Memory Map for the C__H series.

Here is a link to the Operation Manual.

C_H Operation Manual

C_H_Memory_Map.pdf

Thank you! I will check that out

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I finally found my answers, so I´ll write them down if another newbie is searching. 

instead of calling them IR00201 its IR002.01... thats the reason which why I didnt get it. See this Omron C-series document.

5cdf2d9e469cb_DataAreaRange.png.d2e4fc2e

some outputs on C40H are labeled 200, 201... until 303 that would be 2.00, 2.01... until 3.03 in the ladder diagram coil output for example  -------O------- so if you look here in the memory,

If you right klick on the memory icon in CX-programmer and choose to view with binary setting. You can see this outputs bits in green. One for each output.

5cdf29b0b02d1_outputsC40H.thumb.png.0e37

The inputs logical system works about the same.

some inputs on C40H are labeled 002, 003... until 015 that would be 0.02, 0.03... until 0.15 in the ladder diagram connector input for example -------I I------

Same logic with inputs here in red

5cdf29ade8ce4_InputC40H.thumb.png.e62fbc

Of topic but good to know, is that the physical relay outputs is just a closed contact between the close COM and the 'output 201-303 or whatever you use. 

The inputs are controlled by putting a voltage across a COM with -     and 002-107 with +   

Input voltage is rated at 24v but less voltage works, if its not way too low.

 

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