⚠ Gen 1 Ethernet Node Has Been Discontinued

This help page is for the legacy Gen 1 Ethernet Node, which is no longer available for purchase. These help pages remain available for existing customers needing configuration support.

Looking for Modbus TCP/IP or RS485 node discovery for your current system?
Our LT Series DIN Rail Transmitters support RS232/RS485 serial data with Modbus RTU, Modbus ASCII, and Modbus TCP/IP protocols, and include automatic node discovery via our free Instrument Setup Software. Up to 30 transmitters and panel meters can be daisy-chained on a single RS485 bus and discovered automatically on a LAN.

For direct Ethernet connectivity, our LTE Series Transmitters connect directly to a LAN via Ethernet with Modbus TCP/IP and web access — no separate Ethernet Node required.
Modbus TCP Port

Node Help Overview
 
Network Setup Pages:
 
Refresh Net
 
Static IP
 
Gateway IP
 
Subnet Mask
 
TCP Time-Out
 
Modbus TCP Port
 
HTTP Port
 
Discovery Port
 
Stealth Mode
 
Auto-Discovery
 
NTP Server
 
NTP Interval

 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.