FieldServer Protocol Driver Sheet
GE-SNP Protocol Serial Driver
FS-8700-66
1
Version: 1.05 / Rev. 1
DESCRIPTION
4
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
rd
used by the HMI and 3 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.
1.1
Nodes
5
1
DEVICES TESTED
Device
Series 90-30 CPU 364
Intellution FIX32’s SNP
device driver.
6
6.1
Only 1 Client node allowed
on Multidrop systems
FORMAL DRIVER TYPE
Serial
Client or Server
3
RS-232 or RS-485 (Two wire,
Half-Duplex)
Baud Rates:
100-19200, standard baud
rates only (Vender imitation),
19200
7,8
Data Bits:
1,2
Stop Bits:
Odd, Even, None
Parity:
Multidrop Capability: Yes
Tested
(FACTORY, SITE)
Factory & Site
Site
COMMUNICATIONS FUNCTIONS –
SUPPORTED FUNCTIONS AT A
GLANCE
Comments
Server
2
Connection type:
Connection Facts
FieldServer
Mode
Client
CONNECTION INFORMATION
Data Types Supported
FieldServer Data
Type
Analog Input
Digital Input
Analog Register
Digital Register
Analog Output
Digital Output
Description
Data Type)
(or
Device
COMPATIBILITY MATRIX
FieldServer Model
FS-x30
SlotServer
ProtoNode
QuickServer FS-QS-10xx
QuickServer FS-QS-12xx
ProtoCessor FPC-ED2
ProtoCessor FPC-ED4
Compatible with
this driver
Yes
Yes
Yes
No
Yes
Yes
Yes
Page 1 of 2
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FieldServer Protocol Driver Sheet
GE-SNP Protocol Serial Driver
FS-8700-66
6.2
Version: 1.05 / Rev. 1
Read Operations Supported
FieldServer as a Client
Discrete Inputs (%I)
Discrete Outputs (%Q)
Discrete
Temporaries
(%T)
Discrete Internals (%M)
Genius Global Data
(%G)
Analog Inputs (%AI)
Analog Outputs (%AQ)
Registers (%R)
%SA Discrete
%SB Discrete
%SC Discrete
%S Discrete (%S)
6.3
Unsupported
Types
Function
Programming
messages
Datagram
messages
FieldServer as a Server
Discrete Inputs (%I)
Discrete Outputs (%Q)
Discrete
Temporaries
(%T)
Discrete Internals (%M)
Genius Global Data
(%G)
Analog Inputs (%AI)
Analog Outputs (%AQ)
Registers (%R)
%SA Discrete
%SB Discrete
%SC Discrete
%S Discrete (%S)
Functions
and
Data
Reason
FieldServer is a data transfer device,
and as such, programming messages
are not required
These messages are defined by the
SNP protocol to allow multiple data
types to be packed into one
message. They are not commonly
rd
used by the HMI and 3 party
applications and are inconsistent with
the FieldServer’s Write Through and
Port Expander capabilities.
Page 2 of 2
O. +1 408 262-6611
Sierra Monitor Corporation
1991 Tarob Court, Milpitas, California 95305 USA
TF: +1 800 72 SIERRA (74377) F. +1 408 262-9042
www.sierramonitor.com