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Walkerok last won the day on March 7 2019

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  1. This is an older question but I thought I would respond. Having written mixer programs before this is the method I used to arrive at the correct weight for each batch run. At the beginning of the day the mixer was zeroed. But after that never again. In my process each batch had a recipe of water, gypsum and sand. At the beginning of each batch all that is needed is to look at whatever the mixer has as its weight at the beginning of the batch and look for the difference in weight as the ingredients are being added. A screen shot of a main viewing screen has been attached as an example. I
  2. It is not possible for anyone to help with your question without knowing what the mechanical components are and how they work. Just an example question ......................... what pumps the fluid? Depending on the answer you have remarkable different solutions to the problem. Just an assumption but a vending machine that needs to meter out a fluid generally will be using a "systolic pump" so for each rotation of the pump a fixed quantity of fluid is dispensed, but non one can guess how fast the rotations will be or how much the pump dispenses in volume per rotation. You have to be m
  3. Sorry, but there are no U90 compatible products that allow multiple serial ports (none that I could find). The original hardware you are using the JZ20-R31 does not have any analog output capability by the way, but to get the IO you need with the communications you need will take you to the V130-33-TA24 and then add either the V100-17-RS4 or the V100-17-RS4X. Thanks Keith
  4. If you go into information mode for the PLC you can get into system settings and go into the system section you should be able to make a PLC change from run to stop or the other way around. However I have never encountered a program where the act of running the program stopped the PC communications, however first time for everything. If you stop the PLC and are able to communicate then the program is what caused your problem. Good Luck Keith
  5. There is nothing pre-built into the PID function block to give you this ability but you can write it for yourself easy enough. You decide when you want to run a PID loop in your ladder. You can suspend a PID whenever your current value is within a dead band you hardcode in the ladder around a set point, or make it settable on a screen. (there is a pause I and D calculations block that will stop calculations for as long as you say. You can stop the entire PID loop when you are within the dead band for a period of time. Your choices as a programmer. Good Luck Keith
  6. So I am sure that some of you may know factoid 2 already but I decided I would share the benefit of lots of testing with everyone. In our products we use the V570, V350 and the JAZZ units to talk to variable speed drives on a regular basis. Most drives come standard with 485 Modbus as the only communications type unless you spend extra money getting optional com cards for the VFD. Two factoids relative to noise. There was a conversation that happened accidentally in the "I have a new project" topic where someone said that Unitronics was very susceptible to noise. Well VFDs make a large amount
  7. Everyone has a bad story about every brand of PLC ever offered for sale if you use enough of them. I have had AB, ABB, GE, EZ automation, Automation direct, Moller, Eaton, Schneider, Siemens all fail at one time or another. There are cases where the Unitronic's PLC has frozen or stopped working. I have had failures for water, H2S, lightening, power surges, line slaps, ambient heat, transformer explosions.... Etc. can kill anything. This is all par for the course if you install enough product. After installing upwards of a thousand PLCs (all brands) I can say that I really like the Unit
  8. I am unaware of any pre-built function blocks that will do the cascading you want. You have to write it out long hand in the nets with timers and compare blocks to make the lead lag control you want. Good Luck Keith
  9. if by cascading you mean lead/lag function then there are several ways to do this but one way is: you tell the system to hold a particular pressure. Run pump 1 only ........ if pump 1 has to run greater than 90% of capacity for more than a programed amount of time then bring pump 2 on line to help pump 1. If the combination of pump 1 and 2 runs for less than say 40% of capacity for a programmed amount of time then turn pump 2 off and let lead pump (pump 1) handle all of the load. Automatically switch which pump is the lead pump when both pumps stop to equalize run time. Or automatic
  10. +1 for enhanced Vision controllers also. This is really necessary for OEM applications where the same program is used over and over, but the sensor ranges can always be different from one job to the next. I know that the circular guages are not able to do the integer linking now, but this would be an awsome addition. Thanks Keith
  11. 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
  12. For my part I am looking for an enhanced Vision answer to these requests. Thank You Keith
  13. I have a secondary question. I know that I can only have 64 files without the possible corruption of files. In todays technology can't we manage to either allow more files than 64 per folder or at least allow for more than 4 "Excel" folders. We have customers that 64x4 will only allow a customer to have a very short term of SD card data logging. In this case the customer is testing aircraft radiator sections and each and every part must have its own file name so that it can be stored with all of the other required files and paperwork relative to the specific part number tested for tr
  14. I have uploaded a demonstration program on at least one way to show two tank levels in a single tank space they way you want. The program is competely simulated but you will be able to get the idea of what needs to be done. Thanks Keith oil and water tank level simulation.vlp
  15. 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.
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