Peter Nachtwey
Member
I have seen too many threads where people say they can't simulate a temperature system or similar. I know how to write the software for the most complex systems but I need cheap hardware that people will buy. Think Arduino, Raspberry PI, Propeller chip etc.
For temperature control systems I don't need a very fast micro controller. Updates every second are fast enough and this should be easy. The problem is that for temperature control systems I need an analog input or digital input from the PLC ( analog 0-10v or PWM from the PLC). The output to the PLC, PLC input, should be 16 bit analog 0-10 volts.
I need suggestions for cheap micro controllers and cheap AtoD cards for the output to the PLC.
I would also like to know if any of these cheap micro controllers have a real time clock 1ms loops can be handled for motion control simulation. A lot of cheap micro controllers cannot handle 1 ms interrupts.
At work we use our motion controllers since they can do anything but they are too expensive to use as play things or something to test against.
I want to know of cheap hardware that will do the job. I can provide the software.
BTW, I recently bought a Raspberry PI 4. It is good for what it is but it doesn't have a real time clock and only one timer input. I was disappointed. However, if you want a cheap PC then the Canakit Raspberry PI is a good deal and highly recommended, it just doesn't work for my project.
I have also bought a Nvidia Jetson Xavier kit. It cost $700. It cost too much for a cheap simulator.
There must be a few of you that get into real time control with cheap controllers.
For temperature control systems I don't need a very fast micro controller. Updates every second are fast enough and this should be easy. The problem is that for temperature control systems I need an analog input or digital input from the PLC ( analog 0-10v or PWM from the PLC). The output to the PLC, PLC input, should be 16 bit analog 0-10 volts.
I need suggestions for cheap micro controllers and cheap AtoD cards for the output to the PLC.
I would also like to know if any of these cheap micro controllers have a real time clock 1ms loops can be handled for motion control simulation. A lot of cheap micro controllers cannot handle 1 ms interrupts.
At work we use our motion controllers since they can do anything but they are too expensive to use as play things or something to test against.
I want to know of cheap hardware that will do the job. I can provide the software.
BTW, I recently bought a Raspberry PI 4. It is good for what it is but it doesn't have a real time clock and only one timer input. I was disappointed. However, if you want a cheap PC then the Canakit Raspberry PI is a good deal and highly recommended, it just doesn't work for my project.
I have also bought a Nvidia Jetson Xavier kit. It cost $700. It cost too much for a cheap simulator.
There must be a few of you that get into real time control with cheap controllers.