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We all look to you! I hope my system can be as impressive as yours!

I didn't realize they made those. I will just use the STI file for my PID, calculate the appropriate ON time, then use a 2s cyclical timer and hold the output on for TIMER.ACC ≤ PID ON TIME.

You could look at ways to make an arduino talk to the PLC through modbus/serial comms. Then you could take advantage of the I2C or other available protocols on the board. Someone in the Automated Brewing sub is working on something similar. You could extend this to multiple arduinos. Edit: Not...

Sigh. I have been working through this in my head now for a few days. PID loops in PLC: Pros: Cleaner interface, more control over loops, alarming, variable SP (step mash), cheaper Cons: More work for me(auto tune algorithm, time proportional code), accuracy concerns. You convinced me...

Yeah the cmores have some capability. I like the advanced hmi route, it is what I chose!

There are many ways to go about save/load recipe via different protocols. I have used a VBA script to send ethernet messages to a CLX. There are also easy ways to push CSV or TXT over serial. You could also setup recipe creation in the PLC. More specifics on your soft/hardware would help :)...

Just made a couple of small purchases. Trying to finish up the panels and get everything set so I can start saving for the hardware! 2 - RTD to 4-20ma (0-150C) transmitters New 3" deep wireway for the panel. (1" Was shallow and looked strange) edit: I realize these transmitters arent in the...

SAGE. The arduino pi is great for a roll your own solution. Especially with the RPI 2 (windows 10 support) out now. Lots of good examples out there for pi-arduino control

I am more than willing to help. If you want inspiration checkout CladiusB and kladue setups! Those guys have working automated breweries. As for the automation on yours, what level of control do you want? For starters on Ladder Logic, check out some basic examples. Motor start stop, and...

Lets compare. 7gallons, 72F - 155F - 212F. Typical brewday by time. (Heres the calc I used) 3000W @ 120VAC (2.53F/min rise) 25A 72 to 155: 32.8min 155 to 72: 22.5min 5500W @ 2400VAC (4.65F/min rise) 23A 72 to 155: 17.8min 155 to 72: 12.3min So, 1.83 x the wattage gives us 54% of the...

I am a bit biased. But I think a PLC is the easiest way to go. If you understand how switches work, you are set. Check out a simple PLC motor starter. That will do about 95% of what you want. Look HERE and feel free to message me with specfic questions!

Do you have any 4-20ma or 0-10VDC inputs? You could always use an RTD transmitter.

Don't forget your terminating resistors!

Very nice. There are ways to roll your own PID functions, I was going to use the available blocks in RSLogix 500. That would give me a PID scaled output which I could use to make a PWM based output! Looks like the 1762-IR4 cards are going for $200. Only $65 more than 3 PID's and I get the...

[Redacted] Posted some incorrect info. Let me find what you need! Other than that your plans (and budget) are sound.

Awesome progress! Cant wait to see it in action!

The plan was to use discrete autotuning PIDs, like Kal's build. I, however, am considering implenting PID control through the PLC. I just need an RTD card!

Wow those are pricy.

Do you have a link for this sensor?

Haha for his setup using "non-ebay" components. You would be in the $100k ballpark, without the engineering and install costs of course ;). That man has poured weeks of work into that setup.