DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 146
13.2 REMOTE COMMAND EDITOR
The remote command editor is used to define commands issued using an RS-232 or IEEE-488 interface.
The editor changes display options based on the type of command being set up. Some commands
require a response while others do not.
Remote command editors are connected to the DUT Definition [Read] and [Set] tabs (see Sections 8.5.8,
8.5.9) as well as to the Hardware Definition [DMM] , [Power Supply] , [Frequency] , [Pressure] ,
[Temperature] and [Flow Controller] tabs (see Section 10.3).
13.2.1 INITIALIZATION COMMANDS
Initialization commands are used to set a remote device to a known state. This can include
setting a specific unit of measure, range information, gas selection, clearing error buffers, etc.
All commands entered are sent just one time during the initialization phase of
[Run DUT] and
[Run Test] run mode execution (see Sections 7.2, 7.4). Responses to initialization
commands are not used in any way by COMPASS . Therefore, there is no requirement to
specify set or read information.
See Section 13.2.4 for information on Command Editor features.
Figure 83. <Initialization Commands Editor> Panel
13.2.2 READ COMMANDS
Read commands are used to obtain an output from a remote device. When COMPASS is in
a run mode that uses the device, the read commands are constantly sent in order to provide
real time updating. The faster the instrument responds, the faster the refresh rate on the run
screens (see Section 6.7). For this reason, it is best to use the smallest number of
commands possible to obtain the desired instrument response.
Although, up to ten commands can be issued as part of the read process, one command must be
specified as the actual read command. This command, when formatted using the
<Leading
characters to strip> , should yield an output value in the measurement unit specified for
the instrument. Select this command by “dragging” the arrow, “ ”, next to it. Each DUT or data
acquisition device has it’s own unique set of remote interface commands. Refer to the DUT
manual for details on remote commands.