Dual output relay and SSR at same time

[carecon77]

#3614

Hi,

I need a PID who power two relays (or SSR relay) during the ramps (if the temperature is to hi, cool (relay2); if is to low, heat (relay1)). Does the OSPID do that? Can I use both two outputs at the same time?

[ndijkhoffz]

#4037

Are you talkin about controlling one external SSR, and one external relay. Or the relay inside the osPID?

[Brett]

#4038

to control two outputs at the same time you would need to modify the firmware a bit. definitely the output card code in io.h, and then presumably some stuff in the main program to make the outputs fire when you want them.

as far as relay/SSR for the second output. by default the output goes to the SSR terminals out the output card, but by changing a jumper you can have the output trigger a second onboard relay (not included)

[carecon77]

#4039

Already did that. I added a few lines in the firmware to do it. I use the OSPID frontend to roast coffee, so, keeping the temperature in line during the ramps, and having fast response when decreasing temperature is very important.

[Matt619]

#4040

Anyone have any suggestions on outputting 12VDC rather than 5 on the digital output? This output will be from the PID control and I will also need an output from the onboard relay to run simultaneously. 😛

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