Merging Client/Server and Control network
I have a question regarding the action that involves merging redundant Client/Server (172.16/17.4.xxx) and Control networks (172.16/17.80.xxx) into one redundant control network (10.149.156.0/24 - primary; 10.149.157.0/24 - secondary) and changing all nodes IP addresses (redundant AS/CS/DS servers, couple operator workstations, couple AC800M controllers and couple Panel 800) on already installed ABB 800xA system v5.1 rev.D. This action would be done on already installed system of a still not commisioned plant.
So my question is - does anybody have experience simmilar to that action and what could be the possible problems that I could run into?
Thanks in advance,
Voted best answer
As mentioned in the Network Configuration manual, section 2:
It is strongly recommended that you use the addresses used in the recommended IP-plan (172.16/17.xx.yy), otherwise you have to Explicit configure RNRP. There are a lot of issues to address including things like were youre first project download has to be done from.
Tried this road once a long time ago, but rolled-back to implicit config.
Read first, thats my recommendation!
Even though I agree 100% with BEAB, the suggested network address is indeed suitable for RNRP Explicit Mode addressing since a /24 network mask limits the max node number to 254 (which is less than 500 which is a firm limitation of RNRP, regardless implicit or explicit mode).
To get RNRP running, the explicit parameters need to be entered in to each node and then RNRP must be restarted. RNRP Monitor should be used throughout the change to ensure each node is properly changed.
In theory, this should be possible to perform with a few hours of work.
Up to 50 nodes may share the same RNRP area. Up to 100 nodes if ONLY PM891 processors are used.
However, I recommend keeping the implicit addresses; why not keep 172.16.4.0/22 and save yourself the work of entering explicit addresses here and there?
If the need is due to cross communication with other system, why not perform that communication using an additional network card in some PC and let it act as gateway?