Installation guide

Introducing the Modbus Plus Network
890 USE 100 00
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1.5.6 Network Adapters for Host Computers
Adapters are available for connecting host computers to the Modbus
Plus network. The SA85 Network Adapter connects an IBM AT or
compatible product to the network. The SM85 Network Adapter
connects an IBM Personal System/2 or compatible product using a
MicroChannel bus. The SQ85 connects a DEC MicroVAX II or 3000.
Figure 11 shows an example of the configuration of an SA85 adapter
into an IBM AT-compatible host computer.
AMSA85002
DEVICE
DRIVER
MODBUS PLUS NETWORK
SINGLE CABLE
AND
NETBIOS
LIBRARY
AMSA85000
( OR )
DUAL CABLE
Figure 11 Example of the SA85 and Host Configuration
Adapters are supplied complete with the required device driver, a
library of C functions that can be called by the application, a network
diagnostic utility, and a set of sample programs. The Modbus Plus
network cable connects to a communications port on the adapter.
The adapter’s device driver responds to a library of NetBIOS functions
that are called from the application program. These allow sending and
receiving data packets, sending and receiving global data transactions,
and monitoring status.
Applications running in the host computer can read and write
references at other nodes. They can also program remote nodes and
access the global database.