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ANDRE CAETANO

Doubts in Analog Input Card

9 posts in this topic

GOOD EVENING, I have an analog input card CJ1W-AD081-V1 (configured 4 to 20 mA) but the signal from the field is alternating so high. I'm using it on a weighing-machine. Are there something like a filter to put it on. Omron support told me something about AVG function but I don't know how to use it.

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Before using the AVG instruction, open the I/O table unit settings and set the input cycle setting on 64 cycles (max). This usually filters an unstable input pretty well. I don't have a screencopy here but have a look and you'll see what I mean. After changing the setting, transfer PC > UNIT and restart the unit or power cycle the PLC. If that doesn't help you can always have a look at the AVG instruction. Download the CS/CJ series instructions reference manual from the download section it contains instruction usage and example ladder.

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[De acordo com o que vi no seu desenho, suponho que a sua entrada analógica está na àrea de memória CIO: 2002, Correcto? Então agora faça o seguinte: - CF113 --------| |---------- Allways ON flag ________ |AVG___| |_2002__| (Entrada analógica CIO: 2002) ----------- |_&64___| (Média de 64 amostras consecutivas) ------------------- |_D2000_| ------------ Com este código, em cada ciclo de relógio do teu PLC, será registado o valor da tua CIO 2002 (entrada analógica) nas DM's desde a D2002 (D2000 + 2) até à D2066 (D2002 + 64). Não poderás usar no teu programa a D2001 (D2000 + 1), pois será utilizada para cálculo interno do PLC. O programa colocará nautomáticamente os seguintes valores nas seguintes DM´s: D2002 - Primeira amostra da entrada analágica; D2003 - 2ª amostra da entrada analógica; D2003 - 3ª amostra da entrada analógica; D2003 - 4ª amostra da entrada analógica; ..... D2065 - 63ª amostra da entrada analógica; D2066 - 64ª amostra da entrada analógica; Não terás que calcular a média de todas estas medições da entrada analógica, pois ela será colocada automáticamente da D2000 Já agora: Pode ser que tb me possas dar uma ajuda: Tens experiência ou algum tipo de conhecimento sobre o protocolo de comunicação CANopen? é que precisava de falar com alguém que já tivesse efectuado uma implementação Mestre-escravo.

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Well there you go. Not only do you now understand how the AVG instruction works, everybody else got a free lesson in Spanish

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Hi, I dont understand portuguese but i worked with AVG instr. for something similar (Loadcell) and got much better result with a capacitor. I tried many value and got the best compromise (for my application) with value something like 75 or 100 uF. More than this and i had too much lag in the signal variation. Hope this help

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THANKS MARCO, I UNDERSTAND EVERYTHING YOU TOLD AND I COULD IMPLEMENT THIS MODIFICATION ON MY PROJECT NOW ABOUT YOURS, I'M NEW ON OMRON PRODUCTS BUT YOU CAN SEND ME A MAIL ON ANDRE@INTEGRAAUTOMACAO.COM.BR AN WE TRY TO SOLVE YOUR QUESTIONS THANKS AGAIN THANKS EVERYBODY FOR THE HELP

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pdl ha ha ha ha ha !!! LMAO...

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Portugueses and Brasiliens doesnt speak spanish...

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For one that can't tell the difference they do

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