Best Way To Increase Data Link Area? Controller Link.

[Aoto10]

We have a controller link network with 4 nodes. We've come to a need to increase the link size of one of the nodes. The issue is increasing the size of the link size changes the starting addresses of the other nodes.

This is the link for node 4 which is the main node where I want the new data to be read too. The node I want to increase in size is node 6 which has a size of 16 words. I'd like to increase this to 32.

 

When I change the size of node 6 the link address of nodes 5 and 2 get changed.

I know I also have to change the data link table in Node 6 to send the additional data.

I have lots of logic in the node 4 PLC that reads from the original link addresses for all nodes. I feel to increase the size of Node 6 I will have to change any logic that reads from the link addresses of nodes 5 and 2.

 

I'm curious if there are other solutions to this or what is best practice when wanting increase data link size on an established system.

 

Should I not read directly from the link areas and instead move them to dedicated data register locations and work from there instead? This would allow me to spread out the data and allow for expansions of link addresses.

 

Thanks.