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About NickOS
since
11-15-2022
12-13-2022
NickOS
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12-05-2022
05:03 PM
Ah, that is a handy hint, thanks. And good to hear it is noted.
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12-05-2022
04:58 PM
Sure, On UI action set-item-bitmask, it requires a value in decimal format, e.g. '32768' If I place the object with this UI action within a composite widget, then create a placeholder 'bitMask', and use a snippet to drive this, also is fine (like in my images in OP). What I am asking is if I can instead create a placeholder 'bit', and within the snippet convert 'bit' into a bitmask value, So if 'bit' = 15 for this istance of composite, internally I can apply 2^15 to utilise 32768 . In WinStudio, I'd be writing something like: #Word: = #Word: OR Pow(2, #Bit:) where (2,#Bit:) was essentially bitMask derived from my bit input.
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12-05-2022
04:29 PM
As promised to @HmiGuide, a more detailed explanation of what we are doing to claim bit access does not work: I create data within PLC, in this case an MLC. Here it is an INT, but I have tried UINT, WORD, UDINT, etc., etc. I then find and add via browser, and the type is shown. The data is now listed in variable menu, not virtual. Next I create 2 buttons. the first sets a value only. I do this to show that I have got the use of the button correct, such as I also provide a data field to see whole of iINT. And when I press the button, it can be seen in the HMI and PLC the value changes. So my whole commuincation method is proven at this point. I then add a second button which instead uses bit access, and do the same operations. It can be observed here that iINT neither changes in the HMI or the PLC So please, by all means, point out the blatantly obvious thing I am doing wrong, but from what I can see, specifically bit access is not working for this button.
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12-05-2022
03:49 PM
I will put a bit more on that other post concerning how the bit-access isn't working for us. However, question still stands as to whether there is a method and syntax for doing such a placeholder value conversion?
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12-02-2022
02:00 PM
I'm only a couple of weeks into WebIQ, and no previous json experience, etc. It had been mentioned in another post, Bit Access read/write from button, that the syntax bit[n]:Word does not appear to work for the button widget. I can concur I cannot get the read/write access working to an OPC-UA variable via this method. I am workingaround this by using a composite widget, with UI action and a placeholder for Word and bitmask: It works, but I'd much rather have placeholders for Word and Bit, so as to fully replicated the bit[n]:Word syntax. Is there a way to apply an operator, like 2**bit, using snippets? Or perhaps someone knows a better way?
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