Dear Sirs,
I have five Logix 5550 PLC's in use. Also five console computers, three workstation computers, and two servers. (The PLC's are 1756L1M3 series A.)
At the moment everything communicates with everything else. We tried to change the IP addresses so that IT can secure the network, and it looks like the Primary Server and the PLC's lost communications.
When the system was originally set up some 17 years ago everything was on the same subnet . . . Then 'they' moved the Servers into a separate subnet. The PLC's and workstations are addressed around 192.168.11.50 and the server is 192.168.10.44
First question. When I set up two PC's with different subnets (10 versus 11) I can not ping between them. (Both are connected to the same switch. When they are in the same subnet I can ping between them.) What is the black magic that enables the Servers and workstations and PLC's to ping across different subnets?
The Servers and the consoles are Windows 2000, and the workstations are Windows 7. The Servers used to use RSLinx to communicate with the PLC's. (At least RSLinx Service was, and still is, in use. License installed.) They virtualized the Servers - no more physical Server computer for me to yell at or push the power button on. I did not actually do the work - but I have been told that 'they' had to install 'Factory Talk' to get the virtual server to communicate with the PLC's.
What can I look at on the Server to see if Factory Talk is enabling communications between the PLC and the Server?
When we changed all the IP addresses, we were able to get the consoles and workstations communicating with the Server. It looks like we did not get the Server to communicate with the PLC's. Any ideas on what we might have missed? (We could ping the PLC's from the Server.)
Poet.
I have five Logix 5550 PLC's in use. Also five console computers, three workstation computers, and two servers. (The PLC's are 1756L1M3 series A.)
At the moment everything communicates with everything else. We tried to change the IP addresses so that IT can secure the network, and it looks like the Primary Server and the PLC's lost communications.
When the system was originally set up some 17 years ago everything was on the same subnet . . . Then 'they' moved the Servers into a separate subnet. The PLC's and workstations are addressed around 192.168.11.50 and the server is 192.168.10.44
First question. When I set up two PC's with different subnets (10 versus 11) I can not ping between them. (Both are connected to the same switch. When they are in the same subnet I can ping between them.) What is the black magic that enables the Servers and workstations and PLC's to ping across different subnets?
The Servers and the consoles are Windows 2000, and the workstations are Windows 7. The Servers used to use RSLinx to communicate with the PLC's. (At least RSLinx Service was, and still is, in use. License installed.) They virtualized the Servers - no more physical Server computer for me to yell at or push the power button on. I did not actually do the work - but I have been told that 'they' had to install 'Factory Talk' to get the virtual server to communicate with the PLC's.
What can I look at on the Server to see if Factory Talk is enabling communications between the PLC and the Server?
When we changed all the IP addresses, we were able to get the consoles and workstations communicating with the Server. It looks like we did not get the Server to communicate with the PLC's. Any ideas on what we might have missed? (We could ping the PLC's from the Server.)
Poet.