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Walkerok last won the day on March 7 2019

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About Walkerok

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  1. I have looked at your file. You are scaling values into the exact same MI locations that you have designated for the thermocouples on the ATC8 module in your hardware setup. Don't do this. The thermocouples do not need any scalling and the values directly off of MIs 200-207. Delete the scaling blocks and look at it again. The information in the MIs 200-207 should be read with one decimal point implied so for example a number of 506 in MI 200 reads 50.6 degrees C based on how you have your hardware programmed in Visilogic. Thanks Keith
  2. Version Visilogic V570 Version 9


    This program shows a way to indicate two liquis levels in a single tank. Since you can not overlay two bar graphs on top of each other this is a work arround to be able two show two seperated fluids in the same space. Oil and Water in this case.
  3. I am reading what you have said and one piece does not make sense to me. You say you have short wires connected. What does that mean? If you are saying that you have a single wire shorting (for example) T0+ to T0- then this will never work. You can make a home made thermocouple out of any thermocouple wire set by stripping and twising the positive and negative ends together on one end and then correctly connecting the other end to the "T" terminals. (The wires can not touch anywhere exect the end you twist together or it will not work correctly) The wire with the red insulation on it goe
  4. 930 downloads

    PID loop calculations showing on screen entry of variables for a fluid pump that can be set to control from either the suction side of the pump or the discharge side of the pump with Auto tune button added to the entry screen.
  5. Well the results are in and I was not correct on the condensation hypothesis. The final end customer has placed a chemical injection pump in tandem with one of the expected devices and there was no noise canceling hardware installed on it. Even worse the output they decided to piggy back off of changes state once every 30 - 120 seconds depending on conditions. How do I know this? Using the capabilities the Enhanced vision products have I put a data logging .CSV write to the SD card function that took the status of every input, output, analog input, analog output, alarm, and system messa
  6. I have watched this post for a couple of weeks hoping magic would strike because I have multiple V570 units that behave very much in the same way. I have a single customer with 100+ V570 units. The mix is approximately 49 units installed in a common cabinet with a VFD running the motor application. Exactly 51 of the units are on soft starts running their motor applications. All PLCs are the same exact hardware, same program, same power supplies, but VFD installed units are ALL ok and I have 11 soft start units stopping at different intervals for unknown reasons. (stopping is not stopping by th
  7. I am looking for an opinion. My panel assembly shop has 5 times now managed to install a 1N4007 diode backwards and take out the transistor output of different controllers. I have found some bi-directional Zener diodes that I believe while not as quick as a 1N4007 (and at a slightly raised voltage) will do Ok in the job and take away my shops ability to damage outputs by incorrect installation (all outputs are 24 VDC). The part number is SA28CACT-ND and is advertised as a transient volatage supressor. http://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_t
  8. You have 2 ways to do this. 1) Use the float functions 2) Use simple MI values and multiply and divide example A=MI0 B=MI1 C=MI2 Multiply the inside parenthesis by 100 during the calculation Equation changes from C=A*(1+B/100) to C=A*(100+ After the complete calculation for C is made divide the result by 10 to end up with the C value you want with one decimal place. EXAMPLE: 20 pound original weight 35% moisture content (20*(100+35))/10 = 270 = 27.0 on screen value Since you may have entry values to one decimal place it is divide by 10 (if you had on screen entry values to two
  9. I think the thought that is giving you trouble is that the load cell is giving you an actual weight value. It is not. The load cell is giving the load cell modual's resistance data off of the load cell bridge deflecting when weight is placed on the cell. These values allways stay the same at the same weight, but you do not manipulate these values, they just are what they are. So if what I said is true how do you get weight?? A load cell is not like a pressure transducer or temperature sensor. a pressure sensor has a difinative range. lets say that the sensor os a 0 to 10 BAR sensor you
  10. Hi, Load cells are kind of magical when it comes to scaling (not really, but it is fun to say). The whole point to running the calibration is that it will calibrate to the exact weights you tell the system it is. So if you tell the system that calibration 1 is zero KG (this is not really zero this is the weight of the whole mixer assmbly with all of its parts and motors attached setting their weight on the load cell(s)) then the load cell(s) will recognize whatever the unloaded weight is of the mixer assembly as Zero Kg. Then for your second calibration point lets say you define that as 50
  11. I would say use a box from whatever manufacturer you are using to supply you actual load cells. If they do not make one then I woould use the Ricelake. The website is www.ricelake.com and just go to theor junction boxes and pick the product you think will work the best for you. Thank You Keith
  12. The answer to yoour summing question is no you do not have to have a summing box. Generally a summing box is used to ballance the number of load cells you have. For example if you were using a Ricelake box it has multiple potentiometers inside the box and you use these to isolate each sensor and make resistence readings on the load cell in question. When done correctly all of the load cells will match in resistance at the same load point. Read the instructions on your summing box (if you use one) on how to do this. However since you are doing concrete mixing the accuracy that you will hav
  13. JZ10-11-R31 with a FUJI MEGA VFD in the 4-20ma loop. The drawing is intended to show a 4-20ma loop powered sensor with a connection to another device at the same time.

    © Keith Walker

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