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Found 11 results

  1. Submitted by HarryWeatherford on Wed, 06/01/2011 - 21:47 I am new to VisSim. I wish to read data from a csv file into the simulator. The data will be time based and will be used as feedback against the simulator's solution. UDP works easily, but I would like to use files of actual recorded data. What is the easiest way to read csv data files into VisSim to compare with the simulation results?
  2. Submitted by vinayak on Thu, 01/21/2016 - 23:59 I want to know if there is a way to input pre-selected values as inputs similar to drop down menus. Example> if I want to ensure user can input only one of the pre-selected values e.g., 0,25,50,75,100 , but no other values how can I do it? Secondly> if I want to name these values such as NONE, QUARTER, HALF etc. which when selected will input corresponding numeric value, how can I do this in a model? Thanks, Vinayak
  3. Submitted by shaabanyusuf on Fri, 07/20/2012 - 16:28 Hi, I have just installed VisSim. I have tried to run simulations with MATLAB interface but it keeps giving me the error 'Simulation aboted at 0 simulated seconds 21 real seconds'. I tried to run the examples in VisSim but without success. Thank you
  4. Submitted by haitao on Thu, 01/06/2011 - 06:41 Hello, anybody know where I can get help documents about external DLL file and API code? Thanks!
  5. Submitted by Alix on Fri, 04/23/2010 - 21:44 Hi, I want to read an optical fork mounted on a drive shaft with VisSim, and I want to estimate speed and position of the drive shaft. Using eCAP I can have access to the time between two rising edges of the fork signal, which gives me the speed (I use VisSim F280X eCAP module, which works well). Having access to the eCAP register would allow me to directly estimate the position (angle). Is it possible to have access to the eCAP register with VisSim, and how ? I put some details in the attached drawing, to explain what eCAP register means for me. Thanks,
  6. Submitted by lleon on Fri, 01/22/2010 - 20:24 I'm not sure if this is the right forum. I just installed vissim onto a computer that i had already installed visual studio professional 2008. i expected vissim to add the dll wizard files to the visual studio suite of project templates. I did this previously for visual studio 2005 and it worked just fine. however, when i open visual studio 2008, i can not find the vissim dll wizard. can you tell me how I can add the dll wizard to the project templates?
  7. Submitted by Enric on Wed, 05/25/2011 - 15:11 I had a question regarding a model which I am trying to create: please note I am quite new to Vissim. I am trying to model the level of a solute in the blood using a mass-transfer model. The model is defined by a number of compartments, with mass flow occurring between them and a number of integration functions, plus "unknown" constants which define the rates of mass flows between compartments. To create the model I have guessed these “unknown” constants and now the model is up and running. What I want to do is to “optimise” these constants to produce a model where the blood level most closely matches real, measured, values. Please could you give me some guidance on this. I have two initial questions: Obviously there a variable called “time” which ticks upwards as the model progresses. How can I access this variable to display another variable at a set time point (to compare to my actual values). ie. An operator which would allow the following function: WHEN time=x1 seconds, THEN display variable X. When time=x2 seconds, THEN display variable X. If I could do this, then I could perform the most simple form of optimisation by comparing variables visually ! In addition, being able to do this would give me a set of readings at set time points which I could use for optimisation. In my relatively simple model, which produces in the end a single output (solute concentration), how can I devise a system that optimises the solute concentration curve against actual measured levels that I have at discrete time points ? I am not sure if I should be using the Cost function here. Any guidance on this would be appreciated- and thanks. I'm not after someone doing the model for me, its more that I'm still getting to grips with what functions are available for this.
  8. Submitted by Joe on Thu, 10/17/2013 - 22:31 For my Master Thesis I will build an Operator for a virtual Plant. So, my problem is to get the readings of several devices. They are stored in a MySql database. The other Problem is to write the used changed Readings to the Database. I am very Thankful if you can Help me build the Blocks, to connect to the different addresses of the Devices. Friendly Greetings René
  9. Submitted by mmmazzar on Wed, 01/29/2014 - 01:36 Im sure it is something simple that I am doing. I added a PID block to my simulation. I tied in the SP, PV, and Out. When I run the simulation, the embeded block does not execute. Any ideas?
  10. Submitted by vinayak on Sun, 12/27/2015 - 17:17 Has anyone used Visim model to query REFPROP database? Refrigeration related, property database. http://www.nist.gov/srd/nist23.cfm I need example/ sample as how to query the database from VisSim model. REFPROP MINI is a free version for education. Thanks,
  11. Submitted by ATHIESH on Mon, 07/01/2013 - 01:14 Error occurred while importing simulink model to vissim could not complete conversion of the simulink model syntax problem in line :16 } SpacePWM.m is intialization file, run it before simulating visexam.mdl and try to import the file visexam.mdl into vissim with intialising file SpacePWM.m file please find the attached files SpacePWM_0.m visexam_0.mdl
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