I´m doing a new project in my job, it´s a level inspector based on a vision system.
The inspector works fine, the problem it´s the rejector, i can´t expulse the bad bottle,
using a simple delay because the line´s speed it´s variable, sometimes faster and sometimes lower.
there are 2000mm between the inspector and the rejector.
I have a micrologix 1100.

what can i do?

sorry about my english....

So do you have an encoder?
There is a file in the download section: http://forums.mrplc.com/index.php?autocom=...mp;showfile=577
This is for a ML1200, but the ML1100 will be very similar.

IAFRANCO: con que estas controlando la velocidad de tu conveyor?
es un convevoy constante o es indexado?

2000 mm doesn't say much but you've got a bottle line which says line speeds are probably pretty high regardless. I will describe the standard method for doing this that does not rely on timing at all that is used in a glass bottle plant. The alternative is to measure line speeds and use timers. I don't know if the Micrologix processor is fast enough to do either one because it depends on your line speeds.

Place a photo eye just behind the vision system. Place another photo eye just in front of the reject point. Use an air knife to push bottles off at the reject point. Create an integer file long enough that it can store one entry if all bottles are lined up as close as possible in 1100 mm.

Every time a bottle passes the photo eye next to the vision system, use an FFL (FIFO load) command to store the status of the bottle (good or bad) into the integer file as a FIFO queue (first in, first out).

Every time a bottle passes the photo eye in front of the reject point, use FFU (FIFO unload) to read the value in the queue. If the bottle is bad, turn the air knife on to reject it. If it is good, turn the air knife off.

The FIFO queue stores the status of all the bottles between the vision system and the reject point. If your photo eyes ever miss a bottle, a bottle falls off the line, or if someone removes a bottle from the conveyor, the system will fail. Make sure to provide a button so that someone can remove all the bottles from the conveyor, put them back on the line in front of the vision system, and reset the conveyor. Operators and mechanics do this all the time and don't realize what they are doing. You must train them to either remove all bottles from the conveyor and reset it or do not touch any of them.

Thank you very much, i´m going to study that ml1200 exmaple.

La velocidad del transportador depende de la velocidad de la llenadora, no es constante.

una de las formas que se me ocurre es que utilizes dos BSL (Bit Sihft Left) con una longitud igual al numero de espacion que tienes entre el sistema de vicion y tu punto de rechaso/expulcion,cada vez que el sistema de vicion te "aprueba" una botella le fijas un 1 auno de los arreglos de Bits y cada vez que tengas una botella o contenedor el la estacion de inspecion le fijas un 1 al otro arreglo de bits,luego cuando termines la inspeccion permites que elos BSL sea verdad y esto te desplasara los bits a lo largo del arreglo, si el sistema de vision te rechaso el nivel del contenedor entonses en lugar de fijarte un 1 en el arreglo de bits este se lleva arrastando un "0" y al final puedes compaar los dos arreglos en la ultima posicion y si no son iguales entonces expulas la botella