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Old 12-30-2012, 06:54 PM   #41
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Got all the parts needed for the circuit except the power supplies. China's slow boats are getting faster haha. Setup a bread board with the circuit on it and am going to run some tests on it to make sure my calculations for current draw etc. are correct before I plug it into my DAQ card and blow out the I/O's on it (my nodal analysis is a little rusty and don't quite trust it). Have to wait until I go back to work after the 1st or the power supplies show up, which ever comes first to fire it up and test it out. If all works out I will be building the circuit board and wiring the system up for initial automated tests by sometime next week. This will get me partially automated. Just the temp and the pumps right now. The valves will have to wait until I can buy some electric ones.

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Old 01-11-2013, 04:59 PM   #42
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Got the power supplies! I did the test circuit and I was right had to adjust I/O input resistor to 1.5K ohm to reduce input current draw to acceptable level. While doing all this, I decided to use the DAQ as an address input to the PLC. This way I can setup the ladder logic to use a sequence of the input switches to determine whats on or off on the rig and still use the DAQ to monitor the thermalcouples at the same time and makes it easier to control the whole thing in labview. So far I am wiring the interface board together, writing some ladder logic to test my address theory, and wiring the whole thing together on the PLC. Once this is all done, I should be ready to run some tests on the whole assembled rig except for the electrovalves which I haven't purchased yet. They will be the last part of this assembly.

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Old 01-13-2013, 12:57 AM   #43
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Did the ladder logic and it works as planned so I have 16 outputs that I can control by what address I present on the 8 inputs. I also got interface board almost finished. Here is a picture of it. I am now working on updating the schematic to show the new wiring configuration and will post that as soon as I am done with that. Will post some more progress later.

interface-bd.jpg  
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Old 01-13-2013, 02:52 AM   #44
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Here is the updated schematic.

brauhaus_1.jpg   brauhaus_2.jpg  
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Old 01-24-2013, 11:17 PM   #45
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got some bad news today as I was testing the setup noticed thermocouples were not registering any temp values. Turns out the DAQ card is not working properly so I have to get another one. Bummer. But on a lighter note, got the PLC mounted to the electronics bracket along with the interface board and the two power supplies and am starting to wire it all together. I got a bead on another DAQ I can use so I will let everyone know if it goes through or not.

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Old 01-25-2013, 10:48 PM   #46
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Here's a picture of the electronics cradle with the PLC and interface board installed. Now I have to put the 18 relays that the PLC will control on it also and then mount it under the diamond plate of the rig.

plc.jpg  
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Old 01-30-2013, 01:32 PM   #47
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Good news! Got another DAQ for 100.00 off ebay. It should be here sometime next week. With it installed I should be controlling the PLC and monitoring the temps by end of next week. I also ordered a couple relays and bases so I can start laying out the 18 relays on the electronics cradle and they should be here by this weekend. This thing is getting close to done.

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Old 02-02-2013, 12:15 AM   #48
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Success! I received the DAQ today and installed it in my PC and it works! So far I hooked up the PC to the "electronics cradle" and ran the software to verify it controls the PLC correctly and that is all good. PLC is switching like its supposed too and the thermocouples are reading temps. So all is left is to receive the relays I ordered and wire them into the circuit and install the elctro valves but I still have to order them. Once this is done the rig will be ready to cook beer with full blown automation!

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Old 02-16-2013, 10:11 PM   #49
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Fine tuned software today it works great. Also ordered the relay bases, so when they get here I will wire them up and install the relays. This thing is getting close to done enough to cook a batch.

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Old 02-18-2013, 07:28 PM   #50
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got the software done. Here is a picture of the front panel. If anyone interested in using this software let me know. I can send you a copy of the executable.

software.gif  
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