How do you put a computed cluster value into a queue? I modified the "Producer/Consumer Event" design pattern so that the type of the queue is a cluster rather than a string, but I cannot figure out how to get different values into the queue on each iteration of the loop:
The cluster constant labeled "This should be dynamic" will eventually be a computed value containing the current time and the value extracted from .NET event argument.
Instead of using a cluster constant (called 'This should be dynamic' in your picture) use the 'Bundle by Name' element with the 'SlopeEvent' cluster as input. Then you can dynamically update the values of 'Time' and 'Value'. Like So
If you use the 'SlopeEvent' cluster at severla locations in your code it might be a good idea turning it into a TypeDef (right click the cluster>'Make Type Def.' > Open Type Def. > Save in your project folder).
Note: The picture I attached is a VI snippet. Just drag-and-drop it onto your block diagram. That way you don't have to copy code from pictures all the time. This is especially useful for much larger code snippets...
Related
I am doing a simulation of a production line, which is built through Excel.
Now there is one, which needs free setting of worker shifts for each machine, three shifts in total.
My idea is to create three different Schedules, representing each of the three shifts, and then in the ResourcePool, use the If statement to set up the use of each shift. As shown in the picture enter image description here
But it didn't work. If it is possable, Could you please tell me if there is something wrong with the Java statement or the idea is wrong.
If possible, could you please tell me how to set multiple schedules in ResourcePool?
Additions to the question：
The model is to do the evaluation of the production system and the shift of the workers is an important evaluation parameter. What I want to do is to enter the shift of the workers directly in the Excel sheet and ResourcePool recognizes and uses the corresponding Schedule.
I tried to generate the corresponding Schedule by code, but the Schedule of Resourcepool cannot be set dynamically. So I would like to try to manually input multiple Schedules into the model and then set the corresponding Schedule in ResourcePool by If statement like the image.
Thanks in advance
The first thing you need to know is that the location where you placed the code is a static parameter, thus it is only evaluated once, when the object is created and not checked continuously.
This is indicated by the little popup when you hover over the button that change the entry field from code to value
If it was dynamic it would state Dynamic Value instead of Static Value
Secondly, inside that field you must use a ternary operator, not an if statement, so that the result of the formula is a scheduled object, else you will get a "misplaced construct(s)" error
If you changed the code to
v_Shift == "Shift1" ?
s_Shift1 : v_Shift == "Shift2" ? s_Shift2 : s_Shift3
It will work BUT:
It will only be evaluated when the object is created and not again
Rather not use == on Strings, always use .equals(), on Strings it might work, and sometimes it might not. You can do some research as to why ;-)
Solution: You will have to use a function to change the schedule of the resource pool. Call this function whenever the v_Shift variable changes
I'm trying to clear an array after each iteration of a for loop in LabVIEW, but the way I've implemented it has the values not going directly to what I want, but it changes with previous values in other parts of the array.
It isn't shown, but this code is inside of a for-loop that iterates through another numeric array.
I know that if I get the array to clear properly after each loop iteration, this should work. How do I do that? I'm a beginner at Labview but have been coding for awhile - help is appreciated!!!
[![labview add to array][2]][2]
It looks as if you're not quite used to how LabVIEW passes data around yet. There's no need to use lots of value property nodes for the same control or indicator within one structure; if you want to use the same data in more than one place, just branch the wire. Perhaps you're thinking that a LabVIEW control or indicator is equivalent to a variable in text languages, and you need to use a property node to get or set it. Instead, think of the wire as the variable. If you want to pass the output of one operation to the input of another, just wire the output to the input.
The indicators with terminals inside your loop will be updated with new values every loop iteration, and the code inside the loop should execute faster than a human can read those values, so once the loop has finished all the outputs except the final values will be lost. Is that what you intended, or do you want to accumulate or store them in some way?
I can see that in each loop iteration you're reading two values from a config file, and the section is specified by the string value of one element of the numeric array Array. You're displaying the two values in the indicators PICKERING and SUBUNIT. If you can describe in words (or pseudocode, or a text language you're used to) what manipulation of data you're actually trying to do in the rest of this code, we may be able to make more specific suggestions.
First of all, I'm assuming that the desired order of operations is the following:
Putting the value of Pickering into Array 2
Extracting from Array 2 the values to put in Pickering 1 and Pickering 2
Putting Array 2 back to its original value
If this is the case, with your current code you can't be sure that operation 1 will be executed be fore operation 2. In fact, the order of these operations can't be pre-determined. You must force the dataflow, for example by creating a sequence structure. You will put the code related to 1 in the first frame, then code related to operation 2 in the second.
Then, to put Array 2 back to it's original value I would add a third frame, where you force an empty array into the Value property node of Array 2 (the tool you use for pickering, but as input and not as output).
The sequence structure has to be inside the for loop.
I have never used the property node Reinit to default, so I can't help you with that.
Unfortunately I can't run Labview on this PC but I hope my explanation was clear enough, if not tell me and I will try to be more specific.
I've created a model with Uppaal in which several integer variables change over the course of time. Now I would like to save the values of the variables during the modelling process somewhere (best in xml or a text file). In the Uppaal documentation (https://www.it.uu.se/research/group/darts/uppaal/documentation.shtml) I found the method in point 13 (How do I export and interpret the traces from Uppaal?) and tried the Java API way already, in the hope that it can output the variables as well as the traces. Unfortunately this method seems to be limited to traces. Does anyone know a method to save the variable values from Uppaal?
Hopeful greetings,
Josi
Solution from the comments.
to export the variable value tractory over time, one may use SMC query in the verifier.
For example:
Typeset the following query: simulate 1 [<=300] { Gate.len }
Click Check
Right-click on the query, and from the popup menu choose Simulations (1)
Observe a new window popup with a plot
Right-click on the plot and choose Export Comma Separated Values
Follow the save file dialog and observe the resulting file to contain time and value sequence.
Note that SMC assumes that all channels are broadcast and there are no deadlocks.
Enterprise Architect 13.5.
I made MDG technology extending Object metatype. I have a shape script for my stereotype working well. I need to print several predefined run-state parameters for element. Is it possible to access to run-state params within Shape ?
As Geert already commented there is no direct way to get the runstate variables from an object. You might send a feature request to Sparx. But I'm pretty sure you can't hold your breath long enough to see it in time (if at all).
So if you really need the runstate in the script the only way is to use an add-in. It's actually not too difficult to create one and Geert has a nice intro how to create it in 10 minutes. In your shape script you can print a string restult returned from an operation like
print("#addin:myAddIn,pFunc1#")
where myAddIn is the name of the registered operation and pFunc1 is a parameter you pass to it. In order to control the script flow you can use
hasproperty('addin:myAddIn,pFunc2','1')
which evaluates the returned string to match or not match the string 1.
I once got that to work with no too much hassle. But until now I never had the real need to use it somewhere in production. Know that the addin is called from the interpreted script for each shaped element on the diagram and might (dramatically) affect rendering times.
I am trying to log all changes in variable values in a SSIS generated with BIML.
I managed to create an event handler that writes everytime a variable changes its value.
When I log I use a parameter whose value I set to "System.VariableValue". I pass this parameter (togheter with variableName and PackageName) to a StoredProc and i write in a log table.
My problem is that often (but NOT always) it seems the parameter does not has any value. I see a new line in the DB Log table so this means the evnt is correctly raised and handled BUT it seems the parameter is empty.
The strangest thing is that sometimes values are logged correctly but not always, not for the same variables, not for the same packages, rather, in a quite random fashion.
Could it be a problem the fact that several variables could change value almost at the same time (some contention on the DB) ? I doubt it, because the row itself gets written on the DB. I even tried to write, as a value, something like 'New value = ' + ? that is, appending the parameter value to a fixed string. The fixed part gets written correctly but.. no value.
The name of the variable that changed value is always written correctly.
Any idea what this could be due to?
As a workaround I tried to use the ready-made logging facility of SSIS but in this case in the message column of the SYSSSISLOG table i can just read the name of the variable that changed, not its new value.
thankx
You could use Event Handler to do that. Go to the Variables page, go to Variable Grid Options, check Raise event when variable value changes, and there should be one more option appear for those variables, which is Raise Change Event, default to False, change to True for those variables that you need to track the changes (log). And put a logging task into Event handler
UPDATE
the new line could be the value of parameter has been reset, and that value, most likely equal to blank or whitespace, but still, that is recognized as value change.
if you are not very sure when that happened, you could set a Breakpoint to certain task and add watch window to see how the value change or whether the value will hit blank in the middle of your process