How to set up BLX digital signals correct

Modified on 2021/07/12 07:34 by MKR Categorized as How to, QCX BlendExpert Mill V8

==How to correct wrong digital signals for PLCs in BLX using: “Unpack Single Bit and set State program”.==





BLX cannot handle when digital signals are sharing the same word on a datablock like this example:




Feeder 1 run/stop: 12.250.0


Feeder 2 run/stop: 12.250.1


Feeder 3 run/stop: 12.250.2




It should instead be like this:




Feeder 1 run/stop: 12.250.0


Feeder 2 run/stop: 12.251.0


Feeder 3 run/stop: 12.252.0




If it isn’t possible to get this setup from the Site automation then there is the option to use the calculator program: UnpackSingleBitandSetState




It can be found here:


cph-file18-p\flsadata\External\FLSA-H\Project\QCX SW Production Files\V8\Libraries> and standards - Temporary






Get the solution: UnpackSingleBitandSetState.


Import is as a solution.


Open Calculator and find it on the program list (see image #1)


[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image1.png|medium|left]


























Now go to: Point Editor


And go to for instance Feeder 1:


And select: create new point (see on image #2)


[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image2.png|medium|left]


















Now for instance for a feeder run/stop signal (STS) create the following point (Image #3)






[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image3.png|medium|left]


















Now set Bit as a constant and to: '''0'''


Value: set as: '''As link. ''' Now select the point that needs to be read from in this case: Feeder 1.RunState (see Image #4)




[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image4.png|medium|left]










So for instance for a feeder 1 in BLX it will end up looking like this:




[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image5.png|medium|left]










There are BitPick signals for each digital points that are sharing the same word on the datablock.




Not these new points have to be entered the BLX configuration:


[image:{UP(How-to-set-up-BLX-digital-signals-correct)}image6.png|medium|left]












Now check in the Tag Value Browser that the new points have the right operating state.

Meta Keywords: BLX, Digital signals, UnpackSingleBitAndSetState
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FLSmidth QCX wiki

How to set up BLX digital signals correct