I have 3 tags that i obtain through modbus registers. One tag contains the value. Another tag contains a part of the device location and the third tag contains the remaining part of the device location.
Eg Tag1 : Level of tank
Tag2 : tank number
Tag3 : Area location.
The PLC that i communicate with dynamically changes these tags to reflect the tank with the lowest level.
I need to plot the history of this. i.e. for a given time frame i should know which tanks went to low level.
I can link the Tag 1 to the easy chart. I would like to know if it is possible to link tag2 and tag 3 to the same chart, such that when i use the x trace and scroll, i could see the tank level as well as the information about the location of the tank. ( tag2 and tag3 plot should not be visible in the chart)
I could use cell binding of the name and get the desired format, but the name would only give me the instantaneous value of tag 2 and tag3. So it will not work.
The next thing that i could do is plot both tag 3 and tag2 and use xtrace while making the pen the same color as the background. This too doesn’t materialize because the x-trace feature displays the value in the same color as the tag. So if i make it the same as background I can;t see the value through x-trace.
Looking forward to a solution.