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National Instruments Corporation
3-1
3
Operation of the GPIB-232CV-A
This chapter describes how to choose between D mode configuration and
C mode configuration and contains information about operating the
GPIB-232CV-A in D mode or C mode, data buffering, and handshaking
schemes.
The following terms are specific to the sections in this chapter:
•
A * suffix after a mnemonic indicates active low.
•
A bold mnemonic indicates that it is a signal name, or a top panel
LED indicator.
•
<CR> is the symbol for the Carriage Return character (hex 0D).
•
<LF> is the symbol for the Linefeed character (hex 0A).
Choosing Between D Mode and C Mode Configuration
The GPIB-232CV-A can be configured either as a GPIB device that is
addressed to talk or listen by a GPIB Controller on the bus (D mode), or as
a GPIB Controller that addresses a single GPIB device to talk or listen
(C mode).
When to Use D Mode
The GPIB-232CV-A should be set to operate in D mode if you want to
connect a serial device to a GPIB system that has a GPIB Controller
responsible for addressing the GPIB-232CV-A to talk or listen. An
example of a system requiring D mode includes a serial device, such as
a printer, connected to a GPIB system with an existing GPIB Controller,
