I’m setting up a PID graphic, and I’d like to show three very basic bar-type indicators for the PID set point, process variable, and controller output. I just want to find a very simple bar graph that fills vertically, from Min to Max, and to put three of them on the page. I’m basically after the bar graph equivalent of a sparkline chart.
The bar chart has a few too many bells and whistles for what I want.
I tried out the moving analog indicator, but it didn’t really suit the purpose - it seems to be aimed more at showing multiple variables all on one indicator (e.g. set point, process variable, limits, interlocks, etc) I can make it kind of work by disabling most of the options and using the “Low Alarm” for the process variable, but it’s a bit of a hack, and then there’s a lot of empty space around the actual graphic where other things would be if they weren’t disabled.
I tried out the progress bar, but that only fills left-right or right-left.
I tried out the level indicator, and that works perfectly, except that it only has a “capacity” parameter, which means that I can’t have the graph start with a negative value, and I need a negative value.
Any ideas for another way to get what I want?