Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Bedienungsanleitung PDF herunterladen (Seite 268)

II. SOFTWARE GUIDES - 10. Driver488/W31 10G. Utility Programs

Personal488 User’s Manual, Rev. 3.0 II-253

Under the menu items of the

WINTEST

application are all of the commands in Driver488/W31. The

commands are categorized in 8 groups:

Menu Item Group Description

Device Commands dealing with accessing and configuring instruments

DataTransfer Commands that send and receive data from instruments

Send Low-level commands for sending commands and data to instruments

Query Polling commands

Error Driver query and error handling commands

Events Commands dealing with enabling and disabling bus events

Bus Bus and instrument management commands

Config Driver configuration commands

As the application’s main window opens on the screen, a response window is also opened with the

response from Driver488/W31’s

Hello

command placed in it. This window returns the response from

any input command used during the session.

Note: DO NOT close this response window for the duration of your

WINTEST

session. There is

no mechanism in the application to re-open this window.

Opening a Device Handle for Communication

To perform any of the

commands under the menu

items, it is first necessary to

open a device. Within the

WINTEST

main window is a

menu item labeled Device, as

shown in the figure. The field

labeled

devHandle

holds a

table of all of the devices that

were configured during the

driver configuration process.

Next to each device name, is a

number in brackets

[ ]

. This

number corresponds to the

present value of the handle

associated with the device

name. A value of

-1

means

that the device has not been

opened. Any positive value

means that the device is open and available.

To open a device, select the desired device, then click the OpenName button. All of the commands

under the menus will use the presently selected device handle shown in the

devHandle

field. If the

selected device is not open, an error will be returned. To close the selected device, click the Close

button.

Handle Lists

Several of the Driver488/W31 commands operate on lists of handles (i.e.

ClearList

). To create a

list, select a device in the

devHandle

field that you wish to place in the list, then click the List button.

Repeat this process for all of the devices that you want in the list.

Non-list commands will still use the handle of the device that is presently showing in the

devHandle

field, but list-type commands will use the handles of all of the devices tagged as list handles. All of the

devices tagged as list items must be open to successfully complete a list command.

Selecting a Device Handle

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