12v PLC's.

Post by **KiwiBacon** » Thu Mar 29, 2007 11:10 am

Does anyone have any sources or leads on 12v PLC's?

I've done some work with industrial PLC's, but they're all 24V. For obvious reason I'd prefer 12v digital IO.

Post by **F'n_Rover** » Thu Mar 29, 2007 11:34 am

How many I/O ? It may be easier to build or buy a Microcontroller based board unit, will certainaly be cheaper. Was thinking of doing this myself for a custom BCM. Program in basic or c with a free compiler off net, real easy..

Post by **stuee** » Thu Mar 29, 2007 12:09 pm

Out of curiosity what do you plan on using it for? I've been playing round with some Atmel ATMega microcontrollers for a thermofan control with an lcd display (16*2 line). These are 5V but its dead simple to make a powersupply on the actual circuit board.

Post by **F'n_Rover** » Thu Mar 29, 2007 2:55 pm

stuee wrote:Out of curiosity what do you plan on using it for? I've been playing round with some Atmel ATMega microcontrollers for a thermofan control with an lcd display (16*2 line). These are 5V but its dead simple to make a powersupply on the actual circuit board.

Dont know about kiwibacon, but I want to use it in a similar application to what you want - but mainly to interface with the ecu to give readouts of engine stats, air tank pressure, steering angle other wanky stuff. This is why going the uC shits all over using a plc - you can do so much more usefull stuff. I'll be going either the 20*4 lcd or a graphic screen - both are easy to work with when using the AVR mega chips and Bascom software.

Post by **KiwiBacon** » Thu Mar 29, 2007 3:34 pm

F'n_Rover wrote:How many I/O ? It may be easier to build or buy a Microcontroller based board unit, will certainaly be cheaper. Was thinking of doing this myself for a custom BCM. Program in basic or c with a free compiler off net, real easy..

Tell me more.

The application that's on my mind at the moment is variable vane turbo control. Traditionally it's a vacuum actuator controlled by a valve which could be PWM or analog 0-5v (not sure which, maybe either will work).

Other applications are traction control, fan control etc. Basically analog inputs and switching or analog outputs. Nothing too fancy.

Post by **jet-6** » Thu Mar 29, 2007 5:59 pm

I can get you what ever size you need with I/O's, i use Telemecanique Zelio PLC's everyday, so easy to use, and very simplet to wire, small size etc

Website · Post by **killalux** » Thu Mar 29, 2007 6:52 pm

i would also be keen on one of these, would be looking at using it for transmission control. what sort of dollars are these?

What software is best to use and where can i get it from.
thanks

Post by **jop** » Thu Mar 29, 2007 6:57 pm

i thought the zelio's were 240 or 24 volt, they use them on trucks but not 12v systems

Post by **F'n_Rover** » Thu Mar 29, 2007 7:20 pm

KiwiBacon wrote:
F'n_Rover wrote:How many I/O ? It may be easier to build or buy a Microcontroller based board unit, will certainaly be cheaper. Was thinking of doing this myself for a custom BCM. Program in basic or c with a free compiler off net, real easy..
Tell me more.

The application that's on my mind at the moment is variable vane turbo control. Traditionally it's a vacuum actuator controlled by a valve which could be PWM or analog 0-5v (not sure which, maybe either will work).

Other applications are traction control, fan control etc. Basically analog inputs and switching or analog outputs. Nothing too fancy.

Have a look at the bascom avr site (google will get you there) free basic compiler with a 2k code limit. pwm is well suported and easier to impliment that 0-5v out. Tried to do a screen dump of a basic circuit board file, but it's on a dos cad program = no workie. I'll work it out later and post up if you are interested.

re: traction control - thought about doing this as well, A lot of work though.

Post by **jet-6** » Thu Mar 29, 2007 8:22 pm

jop wrote:i thought the zelio's were 240 or 24 volt, they use them on trucks but not 12v systems

No i have a few 12VDC sitting in my locker

Post by **Davidh** » Thu Mar 29, 2007 8:29 pm

KiwiBacon wrote:Does anyone have any sources or leads on 12v PLC's?

I've done some work with industrial PLC's, but they're all 24V. For obvious reason I'd prefer 12v digital IO.

Could just get a 12-24v converter. Very cheap these days.
Check out Amtex's range. We use 8862's a lot.
http://www.amtex.com.au/

Post by **KiwiBacon** » Fri Mar 30, 2007 6:13 pm

F'n_Rover wrote: Have a look at the bascom avr site (google will get you there) free basic compiler with a 2k code limit. pwm is well suported and easier to impliment that 0-5v out. Tried to do a screen dump of a basic circuit board file, but it's on a dos cad program = no workie. I'll work it out later and post up if you are interested.

re: traction control - thought about doing this as well, A lot of work though.

Is this the site you mean?
http://www.mcselec.com/

I'm not short of home projects so while the prospect of building a controller doesn't scare me, I'd much rather be able to buy something and save my spare time playing with turbos and fixing rangerover oil leaks.

The traction control system is just one of the silly ideas I'd like to try out. But a standalone system rather than interrupting the brake lines. I forgot to mention monitoring of boost, exh backpressure and temps at several different positions as inputs to the PLC. Most of these are analog 0-5v inputs.
I can monitor inputs with a laptop A-D serial converter but outputs and sampling speed are a problem.

A 12-24v converter is a possibility, but I'd rather avoid extra components if I can.

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