Node Protocol

Node Help Overview
 
Device Setup Pages:
 
Select Device
 
Change Device Name
 
Node Protocol
 
Baud Rate
 
Parity
 
Alarm Notification
 
Alarm Dwell Time
 
Alarm Mask: 1, 2, 3, 4
 
Data Email Interval
 
URL Refresh
 
Force Default

 Use the "Node Protocol" field to select Custom ASCII, Modbus RTU, Modbus ASCII, or a pass-through protocol indicated by ? for the device that has been selected under "Select Device". If all devices are by Laurel Electronics, the node protocol, baud rate and parity are automatically selected in a plug-and-play mode as part of device discovery.
  
Multiple devices that are interfaced to the same Node via an RS485 bus can each be set up with a different node protocol, baud rate and parity. This capability is normally only used to accommodate non-Laurel devices.
 
If Modbus TCP is used to communicated over a LAN with the Node, this protocol is seamlessly converted by the Node to Modbus RTU or Modbus ASCII for communication with Laurel meters and transmitters on an RS485 bus.
 
The Custom ASCII protocol is simpler than Modbus RTU or Modbus ASCII. It is recommended when all devices are Laurel Electronics meters and transmitters.
 
The ? protocol selection is a pass-through protocol where the Node simply passes through data packets to the LAN without modification in a tunneling mode. This should only be used to accommodate non-Laurel devices.

Press GO to enter any changes.

Background:  The Device Interface Setup screen applies to the Node whose MAC address is shown in the top right of the screen. That Node is selected by clicking on Setup on the Node Discovery screen. If the selected Node is an Ethernet I/O board of a meter, only that single host meter will be discovered as the device for that Node. If the selected Node is an Ethernet-to-serial device server option board of a meter or is a DIN-rail Ethernet-to-serial device server, up to 31 physical devices may be discovered, including the Node itself. Since Modbus allows addresses of 1-247, there can be unused addresses.