FieldServer FS-8700-66 - Manual (Page 3)

FS-8700-66 GE-SNP Driver Manual Page 3 of 28
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: [email protected]
1 GE_SNP DESCRIPTION
The GE-SNP Serial driver allows the FieldServer to transfer data to and from devices over either RS-232 or RS-485
using GE-SNP Serial protocol. The FieldServer can emulate either a Server or Client.
The FieldServer provides functions to read and write PLC memory and change the privilege level. Standard SNP
mailbox messages are used. The driver does not support Datagram messages and cannot parse them. These
messages are defined by the SNP protocol to allow multiple data types to be packed into one message. They are
not commonly used by the HMI and 3
rd
party applications and are inconsistent with the FieldServer’s Write
Through and Port Expander capabilities.
The driver can expose communications statistics in a Data Array so that downstream devices can monitor them.
2 DRIVER SCOPE OF SUPPLY
2.1 Supplied by FieldServer Technologies for this driver
FieldServer Technologies PART # Description
FS-8915-10
UTP cable (7 foot) for RS-232 use
FS-8917-03 RJ45 to DB9M connector adapter
FS-8700-66 Driver Manual.