Internet PLC Forum

General => Technical support => Topic started by: danier on August 15, 2010, 02:28:30 PM

Title: comparar entradas
Post by: danier on August 15, 2010, 02:28:30 PM

Best friends support
is shortly to complete the program f plc 1616
Just one question, I must continuously monitor two entrances, one that should remain on and two off, if input 1 goes off, then wait a while and then if you select two passes on esperr a while and turn off 2 1 ( transfer is electric generator and the network of public power).
Excuse me but I only speak Spanish
are a great team thanks

Title: Re:comparar entradas
Post by: garysdickinson on August 15, 2010, 07:57:35 PM

Danier,

I am having difficulty understanding your question.   The English translation is of you question does not make much sense.

Can you describe the problem using less language?  Perhaps a flowchart, state diagram or a timing diagram?

Title: Re:comparar entradas
Post by: garysdickinson on August 16, 2010, 08:44:53 PM

Danier,

I think that what you are describing is an "exclusive OR" or XOR.

The XOR behavior is easy to implement with ladder logic.

The attached .jpg file includes your diagram and PLC versions of XOR.