Measurement-computing Analyzer488 Uživatelský manuál stáhnout pdf (Strana 218)

Section 6 Instrument Simulator

6.8

6.8 Command Descriptions

Control of the Instrument Simulator Mode of the Analyzer488 is implemented

with 18 bus commands, described here in detail. Examples are given for the

commands using a PC functioning as an IEEE 488 controller using the IOtech

Personal488 PC/IEEE 488 board and Driver488 software. All examples are given

using GWBASIC or BASICA. The Analyzer488 bus address should be set to 10 for

all examples.

In order to establish communication with the Analyzer488 from GWBASIC or

BASICA, the following sequence must be used:

OPEN "\DEV\IEEEOUT" FOR OUTPUT AS #1

IOCTL#1,"BREAK"

PRINT#1,"RESET"

OPEN "\DEV\IEEEIN" FOR INPUT AS #2

All of the command examples that follow assume that the driver has been

properly opened and reset by the above sequence.

Most of the instructions offer a query (

) option. This option can be used to

determine the current configuration or mode of a command previously executed. Any

number of these query commands may be combined into one string to allow the user

to construct a specialized status command requesting the Analyzer488 to return only

that information which is of interest for a given application.

Attention!

It is necessary that the Execute command (X) follow all

command strings sent to the Analyzer488. No commands

are executed until an X is received by the Analyzer488.

The only exceptions to this rule are the Buffer Data (Bn),

Panel Display (D/string/), and the Query (?)

commands. These commands do not have to be followed

by an X.

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Measurement-computing Analyzer488 Uživatelský manuál Strana 218