Recent content by preinke

Interested Thanks

I would be interested in your PLC project files. What was the reason for your stuck mashes? Paul

I was looking to use a RIM system to heat the mash . One PID would control the outlet of the RIM heater . Its setpoint would come from a PID that monitors the mash temperature but would be bound to small range around desired setpoint and ramped between mash steps.

I started a Micro830 project but have been distracted with work and aviation projects. How did you setup the PWM portion of the control scheme ? I had plans of cascading PIDs for the mash control. I need to get back to this project ! Paul

I started last fall with an Allen Bradley Micro 830 system I purchased off of EBAY. The free Workbench has a modern Windows Visual Studio type interface and includes Structured Text, Ladder, and Function Block Diagram logic editors. Depending on your background, structured text has been compared...

Boil Coil Boilermaker is what you drink at a younger age!

Is there an issue with isolating the temperature measurement at the output of the IRIMS(TM) given that the tube would transfer heat? Do RTD probes have insulation between the probe and the mounting threads ? I've stalled out on my electric conversion presently - too many hobbies - where do...

Or another hobby like aviation or the local craft brewery ...

The PWM controller in the link uses 16KHz . I found an older post where the poster indicated he was using ~700 Hz and found that 20KHz didn't work. The poster indicated that the pump sound (@ 700 Hz) was annoying . Any other data points ?

Will a PWM method work to control the speed of the 24 Volt pumps ? If so, any idea what period should be used and minimum on time ? TIA

I looked at their website and liked the idea that you can buy the RIMS tube, element, and temp probe from a single source. The element description didn't give any connection info, probably something that is included in shipping package. If you have an electronic copy of the installation manual...

I am also going down the cascade route with variable MLT tuning based on flow rate with "clamped" RIMS output temperature setpoint based on MLT setpoint for stepped mash profiles. I am going the route with a Micr830 Allen Bradley but would be interested in your control structure and happy to...

The BrewPI system also caught my eye, maybe it was the color touch screen! It is a nice combination of an open source project and a controller with interface . There is an extensive thread on building your own on this site which should be helpful in troubleshooting your system but not sure if it...

Modbus RTU normally is 8 bit, Odd parity, 1 Stop bit The line needs to "fail safe" to the "1" position, usually the voltage difference between line + and line - should be positive when nothing is going on

Do they have the capability to accept a remote (analog) setpoint ? I come from the industrial world where most PIDs have this functionality. Cascading works better if the two PIDs communicate when they reach clamps or are taken out of cascade mode. The STC1000 has been repurposed to schedule...