Sorry for the delay in replying but I thought it best to seek advice from the MERG Forum specifically dealing with the MERG end of things. My lack of understanding the signals was largely due to thinking I had to create signal heads in JMRI and then add them to masts. I now know better and have created Turnouts for each signal head with a Node that is a software Node. I have used the software node to set up the MERG signal drivers and followed this up with creating the Masts.
I have uploaded the Panel file.
My sticking point at the moment is applying logic to each signal head to describe its interconnections with adjacent signals and turnouts. I have tried several times to set this up but completely failed and I am confused. I thought this would be a simple matter. Could anyone pease help me with this?