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Topic starter
Hi All,
I need your advice and expertise on the redundant node at the station.
One of our customer asking for this, whereby in the existing project he has:
- 1 server and 1 client
- Each of them having one LAN card.
- The connection between PLC and SCADA/PCs are through one network switch.
Now the client want to add additional 2nd USB LAN card in each machine, that means each machine having 2 LAN cards.
He want to do just for a contingency purpose, if one of the LAN card fail, the second one still connected to PcVue and they don’t find communication lost.
The IP provided by him is :-
Server 1st LAN : 84.19.88.100 (Existing)
Server 2nd LAN : 84.19.88.101 (New)
Client 1st LAN : 84.19.88.90 (Existing)
Client 2nd LAN : 84.19.88.91 (New)
If he use this IP’s, is it should work ? Because all the IP’s are in the same network.
Or we need to use 2 different network, for e.g
Server 1st LAN : 84.19.88.100 (Existing)
Server 2nd LAN : 84.19.89.100 (New)
Client 1st LAN : 84.19.88.90 (Existing)
Client 2nd LAN : 84.19.89.90 (New)
How about the port number ?
By default is 1981, if I create a second node it shows 1982. Please explain on this.
I really don’t have experience on this, please guide me.
Should you require any further information, please do not hesitate to contact me.
Posted : 28/02/2013 4:12 pm
The second option is the correct setting.
You need to specify in the router of the network that the 2nd Ip address can access the PLC.
As for the multi station you simply specify that the station has 2 nodes. The first card is link to the client first card and that the second card is link to the client second card.
The port number of course can be the same since what differentiatre the 2 connection is the Ip address.
Posted : 28/02/2013 5:16 pm
Ciao Nagendran,
You can do it easily but I suggest you to use two different IP subnet, like:
Server 1st LAN : 84.19.88.100 (Existing)
Server 2nd LAN : 84.19.89.100 (New)
Client 1st LAN : 84.19.88.90 (Existing)
Client 2nd LAN : 84.19.89.90 (New)
In this case it's enough to install network cards, add nodes to PcVue Multistation configuration, and it's done.
For Port number you can use 1982 (it's not mandatory, just to divide traffic in case of future use of firewalls etc.) for the 2 "New" nodes:
Server 1st LAN : 84.19.88.100 (Existing) 1981
Server 2nd LAN : 84.19.89.100 (New) 1982
Client 1st LAN : 84.19.88.90 (Existing) 1981
Client 2nd LAN : 84.19.89.90 (New) 1982
If you cannot use a different IP subnet (if only the last byte of IP address change) there's a workaround: you need to manually configure Windows Routing: I have written a notes (in Italian sorry :dry: ). You can try to use Google Translate & contact me on Skype if you need clarification.
You can find document here
Posted : 28/02/2013 5:18 pm
Topic starter
Hi Guys,
The customer having problem whereby:
By configuring the new network ports to IP address, he can only ping on these IP address (from Server/Client PCs only). He cannot ping the PLCs, etc.
Therefore this will not work.
There is no redundant link/communication in the PLC side, it is a hot standby PLC so basically the 2 PLCs have one IP address. That is, if primary fails the standby PLC will take over.
Any advise or what can I check with him on this issue.
Posted : 05/03/2013 1:29 pm
Hi,
Did you check the firewall, the plc tcp/ip configuration in PcVue and in the plc's?
Did you check port number ?
What operating system does he use ?
Posted : 05/03/2013 10:44 pm
Topic starter
I just finished the testing and it is working fine with single network. Please refer the image.
I don't see any problems.
Here I attached the test project of mine just for your reference.
Another thing I faced during my testing is, tuning time when there is disconnection in TCP/IP. It takes almost 20 - 30 seconds to reconnect for the second TCP/IP. This part is not related to PcVue, you need to do a settings in the windows side.
I attached a document how to improve detection of disconnection from a TCP/IP network. Please go through.
Thank you for all.
Posted : 27/03/2013 10:02 am
Hello Nagen,
There is also KB99 for tunning time detection.
Exactly what you have attached to this post.
Posted : 27/03/2013 2:45 pm