How to wire state machine

Similar Questions

• How do you create array of enumerations for transitions in a state machine?

  Hello

  I am trying to build a state machine, but I am struggling with understanding of the methods to determine what State to move to the next.  In other words, I have several States, but I don't want to go in any particular sequence.  If I States numbered 1 to 10, I want to be able to go 1-4-2-5-6-2-6-1-10 etc. in no particular order. I want the transition to the next State (and actions) to be determined by data stream, which may be random and require access to one of my 10 States at any time and in any order.

  I saw this photo on the white paper "Application Design Patterns: machinery of State", but it leaves out some important details.  How do I create the structure in BLUE showed 3 c?  When I try to create this table of enums, all are the same. I am not able to make a list of different enum values.  In other words, when I type '2', then all values in the Bulletin Board "2."

  There is a nice video example and easy to a state machine for the distribution of soda $0.15, however, this state machine moves in a single sequence of 5 cents, 10 cents to deliver; It does NOT illustrate the selection of a State "out of order".  I need to understand how a state machine can move State "5 cents" to distribute directly, with the addition of 10 cents in the State "5 cents.

  Can someone suggest a very good tutorial on how to make the switch to operate in a state machine?  I have read some documents available on ni.com, but, I can't find a good explanation of how do.  I remain confused.

  Or, you can just explain how they created the BLUE table in the attached picture?  Maybe I can understand it from there.

  Thank you

  Dave

  
  

• How to transmit DATA between several state machines.

  Hi I'm doing a project that needs to acquire data from a simulated data file and display it on a graphical interface. Two of them are manufactured in a state machine. I wonder if it is a good way of communication of data between two state machines? It would be very appreciated if you can provide a few examples. Thank you very much.

  OK, there are plenty of ways to communicate, but who are these state machines in the same project? Same VI? All LabVIEW?

  I like functional global variables due to the functionality that can be included in the. If they are used wrongly, as most of the things with the coding, you will create the races and break your code.

  Work of local variable, but I try to clear them tsar when possible. If they are used wrongly, as most of the things with the coding, you will create the races and break your code.

  Queues are pretty popular to connect, but try to stay with fixed size data, if you think that the limits of memory could be a problem.

  If you speak through the eyes of network to published static Variables (do not use these unless you have a stable network) network, TCP/IP, UDP, or Web Services flow (you need experience in this field. It is not just together.

  LabVIEW is a good way to program, but this kind of key options.

• How relabel case designated enum in the state machine

  Hello

  I have a state machine application in which typedef enum is used to refer to the names of the case.  Is there a faster way to rename one or more cases to match the typedef enum edited instead of having to rebuild each of them (the case structure loses all enum names if I try to edit in any way)?

  Thank you in advance,

  Oliver Barrett

  www.LinkedIn.com

  One thing to add, once your custom/constant in your block diagram control, if you decide to add a new case after case is added, you can simply go file > apply changes in the control to customize window and they will all up-to-date in your block diagram.

• How to start and stop the video capture in a state machine

  Hello

  I am a student of neuroscience and this is what I try to do: 1) trigger a camera to GigE (200 FPS), 2) start the video capture, 3) triggers a light that stays on for x milliseconds, 4) trigger a valve that will blow an air puff, 5) stop the tone and the valve at the same time and 5) stop the video capture 1 second after 4). For this, my VI is a state machine, with a State for each trigger (ex, 1 State for trigger camera 1 State of light of trigger, ect) and a statement to "stop" and a "time-out State." Everything worked except the video acquisition - the program could trigger the camera but only acquire a frame, because it was not running in a while loop and this is my first question: for an acquisition video is it always necessary to have a while loop?
  I guess the answer is Yes, so I built a loop of 'consumer' for the camera. A queue of the pre-trial 'trigger camera' in the loop of producer, I was then able to start the video capture, but now the problem is to stop it at the right time. I have an another queue in the State of 'stop' in the loop of the producer, but is not able to start the State 'stop' in the loop of consumer, I think that maybe it's because the loop of consumer gets "stuck" in the whole loop.

  I hope you can help me, the VI is attached. Thank you!

  Hello

  First of all, in your loop producer: STATE 'Stop', you use the flushing line, then there is no need to use 'item queue at the opposite end. You can use the enqueue function.

  Secondly, you said "I moved the command stop inside the while loop as you said, but it did not work. But if you look closely, you moved "Enqueue function" inside the while loop. Instead you should use Dequeue function. Please, look at the picture I posted an orderly manner.

  And remove the circled (i.e. function. Enqueue function loop of consumption, where I wrote 'Why stop here').

  Try now.

• How can I control a .vi another State machine?

  I've written a VI which is an event focused on the state machine.  Events are operator actions that take place on closing buttons on the front panel.  Each event features one or more state names on the queue of the State.  A state machine then takes the name of the State off of the queue of the State and use them to open the case, containing the functions to be performed... Now comes the desire to interact with this vi programmatically to an another vi.  Given that events cannot be triggered remotely because the keys are of type lock and cannot be manipulated by the property node (value (signal))... Is it possible to add a name from State to State in Quebec to distance... ?  It would be nice.

  I prefer not to add the buttons 'hidden' for the original vi, or perhaps to change the structure of the event.

  Is there a better way...?

  Hummer1

  You use 'Get in line' with the same name in the other VI or using a functional Global Variable to pass the reference of queues for the other VI.

  Then you write the State via 'Element of the queue' names as you would in the VI containing the state machine.

• How to easily add a State in a State Machine

  Hello

  In my project, I implement a state machine to the constant help of the Enum similarly indicated in the attached file in vi.

  It works fine, but the problem is that I need to know the number of tests (or the names of tests) initially for the copy of the Enum even again and again for each new State.

  Lets say I have a state machine with 3 States only.

  If I want to add a fourth State after the vi is not already so I have to update ALL 'States' Enums with this new State, otherwise the vi is broken. In the case of a project with a large number of States, this can be very time consuming... It seems not to be the best way to update each Enum in the vi whenever I want to add a State.

  Is it possible to update all Enums in my project at a time? Is there a better way to implement this?

  Thanks in advance,

  Mentos.

  Hi Mentos,

  See this link please.

  Mike

• State machine::how to

  Hello

  I try to implement this state below machine transmission

  where x: output input and y where the two streams one and zero

  I read some tutorial that I just need help to complete the vi.

  I thank you in advace

  concerning

  Magnin

  State machines require a few things that you're missing your VI.  More important still missing a box Structure.  The box Structure will perform different code based on the State in which you are in.  You also have something that identifies what state you are in.  It is usually an enumerator. On the inside of the case structure you need code that will determine which State will be the next.  In your case, the value of x is what determines the next State.  Check out this excerpt VI, it should look similar to what you're trying to do.

  

• Problem updating my state machine, using the emg signal

  Hello

  I have problems with my code. My entry is an EMG signal that I gather from three different electrodes using usb 6008. In the program, I divide the signals and display them in a chart that is unique. What I want now is to read the signal, and if a signal passes a threshold I want an LED lights. This must remain lit until there is another signal that passes the threshold.

  To put it simply: "large enough signal--> lamp on--> stay informed--> enough large signal--> lamp--> stay off the coast and then start again."

  I tried a few different approaches, but I decided using a state machine. Now, the problem is that when the signal to enter the state machine the program crashes. I think it's because the table that I use to convert the signals does not update when I get my state machine, so the signal stops to come. But how to get around this problem? It is even possible to code what I want?

  I have attached the code. All the tips are welcome, I have been struggling with this for some time now.

  Thank you

  jenmich

  The problem is internal while the loop is run until the stop condition is true, but he never does a new Boolean entry. So that it remains for always in the same State. Remove the inner loop and put the shift register on the outer loop instead.

  You must also use a daqmx configures the element, and then set the properties of daq. The read.vi can be set to read a number of samples of each iteration.

  Also: you can expand the table to index for several items of output. If you want that element number 0, 1, and 2, you have yet to wire the index entries

• STOP button for program waiting in a state machine

  Hello

  I am trying to create a state machine in order to control a conveyor, mixer pump and linear actuator. Each component runs in sequential order all the time, so I thought that using a state machine would probably be the best architecture program.

  The problem that I am facing, it's that there are States that require more time before the start of the next State. For example, I need to be able to run the pump or mixer for an another period of time. I understand that simply using the VI of waiting is not a good idea because it removes the option to stop the program on the chance that something goes wrong (at least until the end waiting for execution function). I tried to use clock calendar in order to force the program to wait for a term between States, but I found myself with all nested in loops for each State that require stop buttons separate who ends up doing the complicated program (this is what we see in the attached VI).

  I looked at other threads mentioned using notifiers or the structures of the event, but since I use a state machine, I don't know how to use them with several States.

  If there is a way to force synchronization between States while maintaining control of stop button and, eventually, the ability to run any code while you wait, please let me know. I have attached the VI I train, and the emphasis is on the 'wait to hatch open' State.

  Thank you.

  That your state machine shift register is a cluster.  First point is an enum for say the next State to go to.  Second element is a digital that defines how long to wait if the next State is a wait.  Third point is an another enum as first to tell what State to go after the wait ends.

  Start of the loop of State machine, ungroup the first point to know what State to go to.  In your state of waiting, when you have determined the wait is made, ungroup the 3rd point.  Set the first element of the cluster machine of the State to be this enum even if he goes on the next State.  Basically leave wire to move the machine of State wear with it another State of the State, not only the next State, but also what would be the next state when the next State is completed (in case there are several choice.)

• Final State in a State Machine

  I'm trying to figure out how to do a correct state machine and I'm a little confused on how to wire the last State and how it excecutes.  See the attachment for more details.

  Put in what you want.  This State will never run because you say the loop to stop because of the comparison below.  Although I would probably choose a default state which displays an error since if it still does not, you will know that something is wrong with your code because it should not work.

  Rather than compare your registry to offset with a value below to determine when to stop, I just put a Boolean constant True in the State of the stop and that wire directly to the Terminal stop condition.  Set the tunnel for lack of use if unwired so that you don't have to worry about constants false wiring in all other States.

• creation of structures: state machine with controls

  Hello, I wonder if someone can help me with something. I have a sequence, followed by the event structure / while loop.

  someone can help me. I want to create a STATE MACHINE.

  Here's a basic outline of the current structure, I. and this is what I want it to be. I wonder if its possible and how.

  I'm using labview 7.0.

  Thank you

  

  This is what I want?

  

  I looked at your Executive VI.  I don't have an easy way to save in LV 7 now so I'll try to describe in words how I would approach this mess.

  I think it can be done with two loops, a structure of the event, a case structure and not global or local variables.  In fact, there is probably some small business structures and lines inside some of the case, but nothing like as layers of ~ 12 nesting, you're struggling now.

  Look at the design model of producer/consumer (events) as a starting point.

  The loop of producer (event loop) will have the structure of the event.  It will be a case for each control that requires immediate action.  Those that I could identify: get telemetry, side, open Journal printing, abandon, press tank Mode (?) Temp tank (?), Scan, Stop, wait, Step (?) unique, continue and Execute. Most of the buttons must be set on the mechanical action of locking and placed terminals in the case of the event appropriate. So no local population is necessary to reset them.  Those with (?) have no event.  You can have a case of timeout to display Date and time, eliminating which (painful to my eyes) loop.  I don't know about the other stuff in the case of a timeout, but most likely, it is up to the other loop.  If the room 1, 2,... buttons change during trips, they may also need event.  Inside of each event is exactly one element: the Enqueue function.  Create an enum command and make it a typedef. Enqueue this enum value. The queue will be read in the loop of consumer where all the action happens.

  The consumer is your state machine. It has a Dequeue function to get a new order for the structure of the event.  It has several shift registers to transfer data from one case to the other.  These removes your global and local variables.  I'd shift for each of the following registers: the State (typedef enum), cluster of error, temperature (table), pressure (table), results (table), Stat results (table grapes) and a big cluster Indicators_Flags (typedef).  The cluster Indicators_Flags everything that is in the cluster you initialize in the black image sequence (and then never reuse) would have more all indicators except the berries in Maj separate records as well as all your globals and no status indicator, you might need.

  The structure of matter is the heart of the state machine.  All shift registers through it.  It will be the case for what the program does.  Everything in this black initialization setting in about 15 cases of Init.  The while loop to the right of the boot image goes away, but the case inside to become some of the cases of the state machine.  Chassis temperature cycling code goes into 1-3 cases. Mode code pump and read the pressure of your case of timeout event are 1-3 cases.  Code of telemetry: 2 cases.  Print the Page before: 1 case.  Excel code.  Abandonment of code.  Temperature and pressure cycling code of main program: 5-20 cases.  Graphics, record in file: more cases.  Break: 1-2 cases.

  I would like to make a list on paper anyway, you think that you may need and allows to create a typedef enum to control cases.  By making a typedef, it is easy to change without running all over the code looking for the constant in all cases of change.  Enum names will appear on the structure of matter as strings.  Create the loop, shift registers and the structure of the case.  Moving is part of both the original thread can duplicate the case until you have a case for each value in the enumeration of the State.  (Do not use the case of the mark for each value option because it will empty cases that you will then need to wire through.)

  Then copy code from various places in your existing code in the case in the new VI.  Try to avoid copying inhabitants that it will create new controls.  Name bundle to get data in and out of the big bend cluster registry and use ungroup by name.  This provides a free documentation of the data used.

  Check in a month when you have other problems. This will not be a quick fix.  But it will be useful to have a program that works and is easy to manage.

  Lynn

• State Machine with PID control

  Hi, I currently have a problem with my state machine, I control two cylinders double effect in sequence that works very well. However, there is one point I need to increase the pressure in the cylinder and to maintain this pressure through the sequence of State machine, however when the state machine transitions to the next indicate the PID controller resets, how can I solve this problem? Everything in is also allowed to apply the pressure in the cylinder another (same node IO accessed).

  Thank you I joined my project in a WinZip file, then it will have to be extracted. The two main VI to watch is 'Park Brake FPGA VI New' and 'park brake host VI update 2 "(new)

  Thank you.

  Nevermind I solved the problem with a parallel loop.

• Event structure/state machine

  Here's the scenario.

  I use the buttons controlled by the user in an event structure to control a state machine. Currently, I have a different State for each button. However, 4 or 5 of these buttons could ideally correspond to the State, which is what I would like to get... Each of these 4 or 5 buttons causes flow data and the results are stored in a table, but listened data are different for each button! Therefore, if each of those 4 or 5 buttons caused the same condition occur how I could decipher what button was pushed? Ideally, I would have 4 or 5 different paintings once all the buttons are out of the same State.

  Is there anyway that I can achieve this?

  Hi the shots.

  you have access to the refnum of the element inside the event. With the Ref, you can simply get the name or any other property of the control to distinguish them.

  Mike

• State machine pink icons

  I just started studying advice Lab, I m trying to build a state machine to a tutorial to the free rhythm. My problem is that I Don t know how to get the icon in pink inside of the case state. I've attached a file

  Thank you

  In my view, that icon Pink is a local variable for an indicator of the chain.  It is probably an older version of labview, because the icon is different now.  Right click on the indicator, Create > local Variable.  Drag the icon on any on the block diagram.  Then right-click the local variable, Create > Constant for the constant string.  It's great that you are be studious.  Good luck with your learning.