FS-8704-13 – GE – Service Request Transfer Protocol (SRTP)

Driver Version: 1.02

Document Revision: 2

FieldServer Driver

FS-8704-13

GE – Service Request Transfer Protocol(SRTP)

Description

The GE-SRTP driver allows the FieldServer to transfer data to and from devices over Ethernet using GE-SRTP Driver protocol. Almost all GE automation equipment supports the GE-SRTP protocol when equipped with an Ethernet Port.

The FieldServer can emulate either a Server or Client. The driver, acting as a Client, is capable of reading and writing system memory of any number of remote SRTP capable devices. The FieldServer can scale word data ( %AQ, %AI, %R ) when acting as a Client.

When configured to act as an SRTP Server, the driver accepts system messages which write to system memory and responds to read requests. When acting as a Server the driver is always at privilege level 4 (allowing it to be written and read).

The driver cannot emulate a Client and Server simultaneously on the same connection to the same IP address.

The driver is capable of exposing its communication statistics so that they can be monitored by a downstream device. Driver diagnostics & statistics are exposed in the FieldServer data arrays so they may be read and monitored by remote devices / systems.

Write through and port expander modes are supported.

The driver has been timed reading 5700 bytes of table data per second.

The IC697CMM742 Ethernet module supports both GE SRTP and GE EGD.

FieldServer ModeNodesComments
Client1Only 1 Client node allowed on Multidrop systems
Server32This is the limit per I/Net Panel.   The 32 nodes correspond to the maximum of 32 MR’s that an I/Net Panel supports.

Formal Driver Type

Ethernet  

Compatibility Matrix

FieldServer ModelCompatible with this driver
FS-x2010Yes
FS-x2011Yes,
FS-x40Yes
FS-x30Yes

Connection Information

Connection type:Ethernet

Ethernet Speeds Supported

10Base-T, 100Base-T[1]

Proprietary Physical Interfaces Supported

FieldServer ModelAdapter Model #VendorPhysical Medium

Devices tested

DeviceTested (FACTORY, SITE)
All GE Ethernet Capable devices – includes Series 90-30, Series 90-70, Versamax and a number of GE Drives.90-30 CPU 313 with CMM321 (Nov 2001).

Connection configurations

8704-03-connection1.jpg

Connection Notes

Ensure that the device IP_address is configured to be on the same IP network as on the FieldServer.

Communications functions – Supported functions at a glance:

Data Types Supported

%RRegister memory%AIAnalog Input Memory
%AQAnalog output memory%IDiscrete input memory
%QDiscrete output memory%TDiscrete temporary memory
%MDiscrete momentary memory%SADiscrete system memory group A
%SBDiscrete system memory group B%SCDiscrete system memory group C
%SDiscrete system memory%GDiscrete global data table

Unsupported Functions and Data Types

FunctionReason
Programming messagesFieldServer is a data transfer device, and as such, programming messages are not required
The driver supports only a limited set of Service Requests and PDU’s.

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[1] Not all FieldServer models support 100BaseT.   Consult the appropriate instruction manual for details of the Ethernet speed supported by specific hardware.

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