How to make a program using counter

mustaqim90 · Mar 12, 2015

HI i newbies.

i want make a simple program in cx- programming.. i have 4 sensor(detect the box). how to count the boxes that have presents..if all the boxes comes at the same time how can i count it?..

there a simple program or function block?

osmanmom · Mar 12, 2015

Cnt1 + cnt2 + cnt3 + cnt4 = total count

mustaqim90 · Mar 12, 2015

osmanmom said:
Cnt1 + cnt2 + cnt3 + cnt4 = total count

ooo..there a simple program for it?

osmanmom · Mar 12, 2015

i encourage you to do it by yourself then post the program here no matter whether right or wrong.

Lancie1 · Mar 12, 2015

ooo..there a simple program for it?

Yes, use one counter for each sensor, then a math function to add all 4 counter values.

Aabeck · Mar 12, 2015

If you're saying all 4 boxes come together with no space between they may be sensed as one (long) box, if that's the case I would have a conveyor section going a little faster to pull the box to be counted away from the next box, & count the box when you're sure it's separated.

mustaqim90 · Mar 13, 2015

Lancie1 said:
Yes, use one counter for each sensor, then a math function to add all 4 counter values.

oke..i use one counter for each sensor and i add all 4 counter. but i cant get correct value.why?

why i get the value 18??.. it should be 12 right?

mendonsy · Mar 13, 2015

It is a bit difficult to read your JPG files, but I suspect you are monitoring in decimal instead of hex/BCD.
Check the symbol in front of the number, & is decimal, # is hex/BCD. 12 BCD = 18 decimal.

Lancie1 · Mar 13, 2015

Why do I get the value 18??.. It should be 12, right?

Yes. It appears that you are reading some boxes more than 1 time. Try this: use all 4 sensors to create a "Read" Bit (Sensor 1 and Sensor 2 and Sensor 3 and Sensor 4 = Read Bit). This Read Bit goes on only when all 4 sensors see a box at the same time. Then use Sensor 1 and Read Bit = Counter 1; and Sensor 2 and Read Bit = Counter 2, and so on for all 4 Counters. That should prevent reading a box more than 1 time.

The problem may come up IF there are ever less than 4 boxes in each hanger. Then you would have to come up with some additional logic.

osmanmom · Mar 14, 2015

picture not clear,

blurr loh

How to make a program using counter

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