Counting parts and showing Qty on a display

[Guest Guest_Mike]

I'm looking for a way to count parts as they are completed on a production line. My thought was to have an operator slide the part down a tube (at an angle) into a box. Each time a part goes by a sensor, reduce the count on a display by one. When the count is zero, I will sound a buzzer and the plc program will reset and wait for the operator to scan a barcode (to get Qty.) again. I've never done anything with displays other than using an E150 on a project. I would like to use a very cheap and simple display, maybe something from Omega? All I want is 3 digital characters. My questions are, how does a person interface a display with a PLC? Does anybody have recommendations on a display? Thanks! Mike

[panic mode 246]

7-segment displays i've seen so far consume 4 plc outputs (transistor type) per digit. you simply write binary value to group of outputs (like 0010 to display 2 etc.). check IDEC products but i'm sure others will have similar products (Red Lion, Omega etc.)

[Sergei Troizky 26]

You must take in consideration the display programming software cost, when choosing a display. The best one may appear the one you already have software for. By choosing a touchscreen or a display with integrated keypad, you can save on controls and probably end up with comparable cost versus the cheapest indication only choise. I am using the Aromat GT01/GT10 small touchscreen in my projects with Mitsubishi PLC. For indication only, the FX series has an applied instruction to control directly a matrix of 7-segment LED indicators. It occupies 7+(# of Digits) outputs of the PLC. Edited 31 Jul 2005 by Sergei Troizky

[308guru 0]

Which FX plc would you use to accomplish this? I've only used the relay outputs so far with projects. Along with the appropriate plc, is there a recommendation on a specific p.n. display from Red Lion, IDEC, or whoever? I don't really know what I'm looking at/for at this point. Still quite a bit to learn. Panic Mode, I like your idea. As above, do you have a specific PLC/display combo that would work? Thanks! Mike

[panic mode 246]

see this topic http://forums.mrplc.com/index.php?showtopic...t=0entry11542