Microcontroller in industry

[hr_rezaee]

Hi
whitch microcontroller is suitable for industrial environment?
please compare noise and cost.
thanks

 

[bobsanjose]

Hi,
no offense but your question is incomplete at best.

In general microcontrollers with -40/85C temperature range are considered industrial.
Now, there are 4-bit microcontrollers and if I am not mistaken 64-bit micros and in between 8/12/14(PIC)/16/32 bit micros.
Cost is relative to what you need to do and again in general, a single chip solution generates less noise than one with an external bus.

So, my questions to you:
What do you want to do with the microcontroller?
Is this any volume production?
The question about the volume production is because it is worth to trim software to a minimum for large quantities saving 50 cent on the micro but investing weeks and months in the software.
If it is a project let's say 100 pieces, investing the time to save 100 times 50 cent would be a little wrong.
So, may be someone can help you more with more information from your end first

 

[hr_rezaee]

hi
thanks
ok. i want 8 bit microcontrollers. it will work in very noisy environment. I want make just one device. therefor what is suitable micro ?
thanks

 

[philba]

all the major producers have Industrial versions of their chips but that is putting the cart before the horse.

You will need to follow a process:
- determine your needs (number of I/O pins, ADC or not, communications, etc)
- select a supplier (almost any will do - Atmel or Microchip are the leaders)
- select a chip with the right feature set and an industrial rating
- design a board for the chip, use lots of optoisolators and drivers. follow good engineerin practices for noise immunity

or,
- select a PLC which meets your feature needs - they are engineered for industrial environments.

google PLC for more info,

 

[bobsanjose]

After you did what philba recommended, continue and make your circuit save against hang ups.
I would recommend an external watchdog or a device that has an independent internal watchdog with an own oscillator.
Try to use a device that has the option to enable watchdog at Reset without software needing to start it.
You want to use a brownout detect circuit either internal or external
If at all possible no external bus as already mentioned
If in doubt add that additional capacitor ;-)
Use devices that have noise filters for the interrupt inputs if you plan to use interrupts
.....
I could go on for a while but I guess you need to gather some experience and then become better and better.

Bob

 

[hr_rezaee]

thanks for your guidance.
regards

 

[pic16f84]

you can use (plc)programmble logic controller using in the industry and easy to programusing loder diagram

 

[hr_rezaee]

Hi
no i want use microcontroller
thanks