9-59-5
9-59-5
9-5
Networking
may be used to write your own driver software.
A computer-controlled network can be connected via IEEE-488 cables or
RS-232 (serial) cables. In either case, the computer acts as the controller
of the network and uses the driver software to communicate with the
networked machines.
Creating a Computer-Controlled IEEE-488 Network
To connect DNA Engines and DNA Engine Tetrads in a computer-con-
trolled IEEE-488 network, the computer must be equipped with an IEEE-
488 (GPIB) interface card (contact National Instruments, MJ R
ESEARCH, or
an authorized distributor for information about purchasing this card).
Connect the machines and assign addresses as described under “Net-
working Machines Without a Computer” (p. 9-2). Make sure that none of
the networked machines have been assigned IEEE-488 address 0, as this
will cause communication problems with the computer. Install the MJ
R
ESEARCH DNA Engine Driver software on the computer, and use it to
control the network.
Creating a Computer-Controlled RS-232 Network
In a computer-controlled RS-232 (serial) network, each machine in the
network is connected directly to the controlling computer via a serial
port. The number of machines that can be included in such a network
thus depends on the number of serial ports available on the controlling
computer. Use high-quality serial cables to connect the serial port on each
machine (see figs. 2-3 and 12-4) to a serial port on the computer. Use the
Setup utilities to configure each machine for serial communications (see
“Choosing a Remote Port,” chapter 8, and select the serial port and the
9600 baud rate). Install the MJ R
ESEARCH DNA Engine Driver software on
the computer and use it to control the network.
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