The Virtual IO Module (VIM) provides intuitive network setup. However, on networks where a Network Firewall blocks certain Network ports, the communications suffer. The following is a list of exact port numbers that need to be opened on firewalled networks.
Please refer to MYNAH Technologies DeltaV Virtual IO Module Network Gateway knowledge based article for a complete description of Virtual IO Module features, description and specifications, supported industrial ethernet protocols and firmware ordering information. The following table lists the ports necessary for communications with the VIM from VIMNet Explorer. These ports will need to be enabled for proper communications at each network firewall. The common firewall present on most computers is the Windows Firewall. For more information, please refer to the following article "Open a port in Windows Firewall". For other network firewalls please contact your Network Administrator.
|VIMNet Explorer (PPV)||1024||TCP/UDP||Ping to discover all VIMs on the subnet|
|VIMNet Explorer (PPV)||51000||TCP/UDP||Listens for messages from the VIM|
|VIMNet Explorer (PPV)||52000 + (IP address & 0xFF)||TCP/UDP||
Sends messages to the VIM (i.e. last octet of address 10.22.6.1, gives 52001)
|Modbus TCP/IP VIM||502 (user selectable)||TCP||Connection to each ModbusTCP device|
|EthernetIP VIM||44818||TCP||Explicit Messages - UCMM(PCCC)|
|EthernetIP VIM||2222||UDP||Implicit Messages - Class 1/3|
|FMC VIM||1201 (default, user selectable/TPU)||TCP||Connection to each TPU|
|VIMNet Explorer Diagnostics||52000||TCP/UDP||Listens for messages from the VIM|
|VIMNet Explorer Diagnostics||52001||TCP/UDP||Sends messages to the VIM|
The Decommissioned VIMs List is populated based on responses from decommissioned VIMs that send a periodic UDP message from source port 1024 to destination port 51000. When the Decommissioned VIMs List is refreshed manually, VIMNet Explorer sends a broadcast request to all VIMs to update immediately. The destination port for this broadcast message is always 1024 but the source port is determined by Windows based on the next available port. The VIMs will respond with a UDP message with a source port of 1024 and a destination port to match the broadcast message previously sent by VIMNet Explorer.
The port on the VIMNet Explorer computer for the refresh message is dynamic, not static, which makes applying firewall rules based on ports difficult. If the firewall rules are applied based on the above table then the Decommissioned VIMs->Refresh List functionality will be lost. This is not a critical feature because in theory the list will be populated eventually.
If you have any questions or concerns regarding this procedure, contact the MYNAH Support Team by opening a support ticket at MYNAH.com using your account. If you do not currently have an account at mynah.com, please click here for instructions on how to do so.
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