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General Information
1.1
INTRODUCTION
This section provides a description and specifications for ICS's Model 8099
Ethernet to Modbus Interface. All specifications and functional descriptions
apply to all units unless otherwise stated.
1.2
DESCRIPTION
The Model 8099 Ethernet to Modbus Interface is a VXI-11.3 compliant in-
terface that provides RS-232 and RS-422/RS485 serial interfaces to control
Modbus devices using the Modbus RTU protocol. It lets the user send simple
commands with ASCII values over a 10/100 Mbs TCP/IP network to control
and query Modbus slave devices. The 8099 converts these simple commands
into the Modbus RTU packet protocol and adds the CRC checksum to make
a complete Modbus RTU packet. The Modbus RTU packets are sent serially
over a RS-232 link to a single Modbus slave device or over a RS-485 network
to one or multiple Modbus devices. Responses are checked and valid response
data from a query is returned when the 8099 is next addressed to talk.
The 8099 contains a number of advanced features that increase its flexibility
and simplifies their use in system applications. It is an IEEE-488.2 compatible
interface with an expanded Status Reporting Structure that complies with the
SCPI standard. SCPI commands are used to set the serial configuration, and
to enable bits in the Status Reporting Structure to generate Service Requests.
The user can also enter his own IDN message to personalize the unit as part
of his assembly. The 8099 contains a webserver which allows the user to
view and update the 8099's configuration settings. All settings are saved in
nonvolatile memory.
