OdinPT

Well... im new to this world, i admit my lack of knowlage in may areas of this "science"

Hi all, The problem is that i need to do a program with a PLC CPM1A Cpu 20, the problem is that im very noob on Omron PLC system, to be sincere im very noob on PLC's lol... i had some classes in Siemens PLC's but Omron, nothing. I have to do a program to control a simple machine and i would like some of you gave me some lights in programming :| As i said im using a CPM1A with CX Programmer 5.0. What i have to do is : Control a error that the machine gives (24v signal) and use it after 12 cycles (24v signal each cycle). My problem is that between the 12 cycles it can be others errors that have to be controled too after 12 cycles. For example: ------------------------ Error ------------------------------- Whashing ---------- Cleaning ------- Garbage --------- Box |--- A ---|--- B ---|--- C ---|--- D ---|--- F ---|------|------|------|------|------|------|------|------|------|------|------|------|------| --------------------------------------1-- - -2--- ----3---- 4- ---5- - -6-- --7--- -8- --9-- -10- --11-- -12--13- --14---15---- Imagin products called as A, B, C, D, etc etc, the products are in a roller carpet moving to the right, error position lights up and sends 24v to the PLC when any of the products has any problem when passing through Error position, what i want is that after those 12 cycles if the product is ok it continues to the box position if not it is removed to the garbage. My dificulty is the limited programming knowledge, after one product activates the error imagine that the next 3 have error too, how can i do the control to the Garbage ? My ideia is to use counters... 12 counters that are activated with the error and with the condition of the last counter beeing used. Have been reading some CPM1A and CX Programming Pdf's and informations, it seems CPM1A is very limited in programming... If someone can help me i would apreciate it very much. Thanks.

Oh MY GOD you'r the greatest it works like you said Ok thanks a lot for the information, hope i will be able to help someone in the forum too in a nearest future Once again thanks.

Hi again :) Is like this: I want the PLC to control the same rolling carpet in the first example. But i want to turn off and on the PLC when i turn off and on the Carpet... that is.. i use the power suply from the carpet to supply the PLC, my problem is that when i turn on the carpet The PLC doesn't star in Run mode and it can't control the carpet, PWR led stays activated but not the RUN led. I want the PLC ready to work when i turn the carpet on. Once again sorry for the english

Well, seems i have to work this out other way... I need to put my PLC in Runing Mode as soon as he gets the 240v is there a way to do this ?

I'm the one who thank's for helping me out I can't use timers since the rolling carpet can have diferent speeds, you second ideia seems interesting i will try it as soon as possible. Thanks.

Ok ill try to be more precise, the english doesn't help either lol The same example as yesterdary, im using The Shift Register function and when it reaches a bit in the word lets say bit 9 (cleaning Position) i have a photocel in that place that i use to confirm with the value in that bit (1 or 0 ) if ther's any product or not in that position. The problem is if the product gets out from the roller carpet, i can't do the comparison because there isn't anything to trigger the photocel, is there any way to solve this ?

Hi, PLC problem after all... i have other CPM1A and it works ok, now what to do with the damged one ? I have one more thing to ask about the program. I have a Photocel in the cleaning position that compares with the Shift position to see if there is any product to be clean, if the Photo is = 1 and the Shift Position is = 1 Ok or Error Sgnal, but... the problem is that i can only do this comparison when the Photocel is activated... now imagin that the Shift Position is 1 and somewhere before the Cleaning position the product got out, i don't have nothing to do the compare. Is the same problem if i try to do with the Shift function if i use to compare the shift function and the product isn't yet in position it gives the error signal. How can i garantee that the error signal is only activated when thers no product or when it should have a product ? This is a Programming issue i think, but if someone could help i would be gratefull. Thanks.

No the shift register isn't working... and the Output i have changed and doesn't work too... but if i make a simple input / output connection it works fine... I simply don't understand... as i said i will try a diferent PLC.. lets see what can i use..

yes i forced the inputs the light corresponding to the input lights up. But the Output... nothing happens

Yes it's on... This PLC has'nt been working since long time and it isn't in the best conditions, could it be that the problem is electronical ? Tomorrow ill try it in other PLC... Thanks for the Help

Here is the file, so if you can try it in a CPM1A ill be very thankfull. ShiftCPM1A.cxp

This all seems very easy to me... but something is not right im doing like the examples like you said and like its logical and isn't working... may be from the CPM1A PLC ? the funcion works in this PLC but.. i don't know what to do more... When i put in run mode it shows &0 in the Shift register under The start and end bit, thats ok right ?

I want to thank all the help untill now, because your beeing very helpfull. Starting Chanel HR0 ending chanel HR0, im using a word and when i activate the output is with the HR0.12, like the example in the image... I'm not understanding why isn't working. In the image we have the input 0.03 for the signal and the 0.04 for the shifting, im using 2 inputs too from 2 Photocells, i can see the PLC changing state but after the 12 x 0.04 changes nothing arrives to the output. For example i do one input on the 0.03 and then other on the 0.04, after more 11 inputs on 0.04 the output should be activated right ? Is like this that it works ?

Hi again, I have beem reading about Shift Register and i found here in the site an exelent and simple example to work with Shift Register. http://forums.mrplc.com/index.php?showtopic=656&hl= I have done an exact program from the example given in the Image, but it seems that doesn't activates the output... Does that program works on CPM1A ?

Hi, My name is Carlos and im new in the Automation World, i bought a CPM1A and started using CX-Programmer 5.0. Im yet starting to know how to work with the program but it seems something is not right when i try to use the DIFD and DIFU. I want to use DIFU on my 000.00 input so it can activate the Output 010.00 (for example) , for that i use a Normaly Open contact that activates the DIFU in the bit 200.00 then in other network i put the NO 200.00 activating the output, but it doesn't seem to work.. each time i activate the input the DIFD doesn't do anything. Can anyone give a little help please ? Thanks.