GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 120
FEATURE
DESCRIPTION
Command
Terminator
(text entry/drop
down list
selection; remote
interface
<Data
Acquisition
Type>
only)
Defines how the device terminates command strings. The selected (or entered) value is
automatically appended to the end of every command issued. Make sure that the terminator
is not also included in the remote command setup. The selections available from the drop
down list are:
<CR>
Carriage return, ASCII character 13
<LF>
Line feed, ASCII character 10
<CR><LF>
Carriage return line feed, ASCII characters 13 and 10. This is the most common
selection and is selected by default.
Response
Terminator
(text entry/drop
down list
selection; remote
interface
<Data
Acquisition
Type>
only)
Defines when
GFS Tools
will consider an individual response to be complete. This option is
not available in IEEE-488 communications. With IEEE-488 there are hardware level
assertions that define the end of a command and response.
The selections available from the drop down list are:
<CR>
Carriage return, ASCII character 13
<LF>
Line feed, ASCII character 10
<CR><LF>
Carriage return line feed, ASCII characters 13 and 10. This is the most
common selection and is selected by default.
<CR>|<LF>
Carriage return
OR
line feed must be detected in the device response. ASCII
characters 13 or 10.
>#
Read at least “#” characters from the RS232 buffer before assuming the
response is complete. No physical buffer limitations are imposed. When #
characters are received from the remote device the response data is used by
GFS Tools
. This type of termination is useful when a final character is not used
to mark the end of a response.
<#
GFS Tools
limits the RS232 buffer to # characters. When the buffer is full the
response is considered complete and the data in the buffer is used by
GFS
Tools
. This type of termination is useful when the remote response is always
a fixed number of characters.
“”
Delete all text in the field to not use a response terminator. Do not enter empty
quotes.
GFS Tools
assumes that any response is complete when data has
been retrieved from the remote device and new data is not received for 300ms.
If no data is returned from the device a Timeout error occurs. This is really a
safety feature, to prevent false device time-outs in the many devices that do not
have a specific
<Response Terminator>
.
5.5.3.4
REMOTE COMMAND EDITOR
The remote command editor is used to define commands issued using a remote
interface. All
GFS Tools
device definitions that use a remote interface, use the
Remote Command Editor. There are two types of commands defined the
Remote Command Editor
: Read and Set. The key difference is that Read
commands are issued continuously and Set commands are only used to set an
output. To create a remote command set press the
[Edit Commands]
button on
the
[Communications]
tab and use the following procedure:
Use the Editor Toolbar,
[New]
icon to create a new command or select an
existing command from the list of commands.
Select the
<Command Type>
Initialization and Read for measurement
based outputs or Set for controlling outputs. It is not necessary to use
initialization commands. It depends on the requirements of the device
Specify a
<Command Number>
to define the order in which the command
will be issued.
GFS Tools
automatically adjusts the numbering order when
the command set is saved. It is not necessary to remove gaps in the
numbering sequence.