| Modbus TCP Port | |
|
Node
Help Overview |
Use the TCP Port field to enter to the TCP port number
of the Node. Leave the TCP port number at 502
if you have no reason to change to a different number. Press GO to enter
any change. The standard TCP port number for Modbus is 502. It is possible to use a different port number, provided that both the client and server can be set to use a different port number. This may not be possible, and in most cases it will be most convenient to just use the standard port number 502. Our Node discovery software uses TCP port 502 and UDP port 63179. Background: Each Node has an IP address. This is a 4-byte number (e.g., 192.168.0.57) which is used to address Ethernet nodes on a local area network (LAN) or on the Internet (WAN). An IP address can be static and public so that it can be addressed on a WAN and have an associated domain name. It can also be a dynamic address assigned by a router or other DHCP server on a LAN. Such an address is also called a private or local IP address. Our Node-resident firmware automatically discovers the IP address of all Nodes on a LAN or WAN, plus any devices connected to each Server Node via an RS485 bus. |