FieldServer FS-8700-66 Manuel D’Utilisation
Page 3 of 29FS-8700-66_GE-SNP Manual
Page 3 of 29
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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
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.
The driver can expose communications statistics in a Data Array so that downstream devices
can monitor them.