Hi Jaroslav,

What would work but wouldn't I then have to use a PIDU block (or similar) for the main process control? I don't need the accuracy of a PID controller.

This is my current cooling solution.

I'm guessing keeping it simple now I require heating isn't so easy Other people need use this after myself so I trying to not over complicate it. But if I need to then I will, no problem.

Cheers

Mike

Hi All,

I’m trying to put together some control logic to both cool and heat using a dead band. Currently I’m using a CMP block for cooling, this works really well. Now need to add heating to this. I was think about using two relay blocks but I’m sure there is a better way.

Thoughts?

Cheers

Mike

Ok, thanks Jaroslav.

I'll use a combination of the ALB and what I currently have to achieve both. This way I'll get both live HMI and logged alarms.

Cheers

Mike

Hi Jaroslav,

That's perfect thank you, makes sense now. Is there a way I can get the alarm into the HMI. Currently I am using the "simple logger" to show strings for some alarms in the HMI. Can I link the ALB blocks to this somehow?

Cheers

Mike

Hi Jaroslav,

No, not causing an issue as such. Setting the LIN block in such a way fixes the problem and allows the fan to operate correctly.

Cheers

Mike

Hi All,

I'm using one of the PWM outputs on the HAT to drive a small DC fan. The fan takes it's 12Vdc (red) from the HAT (HAT is powered by 12Vdc) and obviously the fans common (black) goes back to the HAT's GND. The fan has a separate control wire (yellow) which requires 25kHz and controls buy 0-100% duty cycle. But the output polarity seems to be the reverse to what I need. See a (very bad) wiring diagram attached.

How can I reverse the output, so it goes from 0-100% duty and not 100-0%? I have had to change the settings in the LIN block I'm using to get it to work, see image of LIN block settings.

Cheers

Mike

Hi All,

I was just wondering what is the best way to log bools. I have 4 or 5 alarm states that I wish to log when they are active. But I don't wish to log them when they are not. Would the TRND block be best for this or would it need to sample at a high rate creating a large file.

Cheers

Mike

Hi Jaroslav,

Thank you for the help. I will give that a go and let you know what happens.

Cheers

Mike

Hi All,

If I have a CNR block in a subsystem, that I am using in a subsystem mask to give say a set point value. Can you still write a value to that CNR block via the HMI?

Cheers

Mike

Hi All,

Has anyone tried, or has working Rexygen on an ESP32?

Cheers

Mike