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Page 25 of 29FS-8700-66_GE-SNP Manual Page 25 of 29
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970 email: support@fieldServer.com
Appendix C. Advanced Topics
Appendix C.1. SNP Node Names
The following notes describe how the Node name is used when the FieldServer is acting as
a Server.
When a Client attempts to establish a connection it may do so by sending the name of the
Node it wishes to connect to or by sending a Null Node name.
If the Client sends a Null Node name then the FieldServer will connect if any SNP Nodes
have been defined for the same port as the Client using the Null name. In such a case the
Node must be connected to a port (This is not always common with FieldServer Server
configurations).
Example: Client uses Null name connection. In this case Node must be connected to the
Client’s port; the Node name is ignored and only one SNP Node per port.
Ports
Port, baud
P1 , ….
Nodes
Node_Name, Port
Node1, P1
If the Client uses the Node name during a connection attempt then the FieldServer uses
the name to find a matching Node. The name must be an exact match. If a match is found
then the connection can be established. In this case the Node does not have to be tied to
a particular port and thus one Node could respond to different Clients polling it on different
ports. If this method is used and the Node is tied to a port then the Client must poll on the
same port.
Example: Client uses a specific name to connect. In this case provided there is a Node
with a matching name the connection will be made
Ports
Port, baud ….
P1, ….
Nodes
Node_Name, Protocol
Node1, SNP