ControlDraw in Windows 8

If you have been wondering whether you can run ControlDraw in Windows 8, the answer is yes, ir runs very well. Here is it, and the Reviewer in the Windows 8 Start Screen.

Of course it runs in the desktop, not as an App.
Here it is starting up. This screen also shows the Win8 Task Manager, which is so much better than previous versions of Windows. It also shows a file copy in progress, again this is a much dialog.

And here is the Milkshake plant overview

No, it won't work in Windows RT, sorry.

Loop and Logic Diagrams and P&ID’s

This has recently been discussed at length on LinkedIn  on the ISA – International Society of Automation group under the title "Does control logic belong on P&IDs?"

Among the comments are
....Adding logic functions to a P&ID clutters it, is prone to add further unnecessary revisions to the P&ID every time a logic is changed ...
...agree that the complexity that we can configure into the DCS, PLc, and SIS cannot be represented adequately on the P&IDs...
...No, detail logic does not belong to PIDs. A PID is a construction document, as such it must show:
1-Hardwired input to logic interlock, complex loop or DCS/SIS
2-Hardwired output from logic interlock, complex loop or DCS/SIS to Final Control Element FCE
3-Identification of logic interlock, complex loop or DCS/SIS. Separate documents are generated for interlocks and complex loops...

So, how much can reasonably be shown on the P&ID depends on the type of process and previous practise but at the end of the day there are nearly always extra diagrams, typically with a cross reference on the P&ID. This blog post provides an explanation of how you can use ControlDraw to draw all those extra diagrams and relate them to the P&ID's
Top level diagram contains an object for each P&ID and child pages then provide a graphical list of the relevant loop and logic diagrams which are then diagrams under each object.
Here is a diagram that explains this (click to see full size)

This can even be extended to cover such things as State based control Matrices and Cause and Effect Matrices
Note - if you have a list of the P&ID's (which is normal) you can copy the list to create the P&ID Overview diagrams using Paste Special as Rows. And you can create all the P&ID Overview diagrams with a couple of clicks from the Group Menu >Create/Link Child diagrams.