DH Instruments COMPASS FOR MOLBOX, Руководство пользователя

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 148
Figure 85. <Set Commands Editor> Panel
13.2.4 EDITOR FEATURES
All Command Editors have common features and some that are specific to certain types of
Command Editors.
13.2.4.1 <LEADING CHARACTERS TO STRIP>
<Leading characters to strip> applies only to <Read> and <Auxiliary Data>
actual output commands. The value entered specifies the number of leading
characters to strip from the device response. This is used to allow
COMPASS to
properly interpret the output when the response does not start with the output
value. This field can include any combination of delimiters and numerical space
values.
For example, a device might return the string, “Mass Flow:4.343 slm”. The actual
output value for this example appears at position 11. Therefore, ten leading
characters need to be stripped prior to processing the string. Alternatively, if the
colon following “Pressure” will always appear prior to the flow value, “:” could be
entered as the leading character to strip. In some cases both a delimiter and a
number of characters to strip may be required. For example, if a remote device
returns “Range 1, 4.34 volts, NR 4.431 slm”, the number of characters in the
volts output can change making it impossible to use a fixed length value for the
number of spaces to remove to access the flow value. To avoid this problem
enter the text
<,,4> as the leading characters to strip value. This tells COMPASS
to move to the second comma, then increment four spaces to read the flow
output value.
Only non-numeric text can be used as a delimiter in the leading characters to
strip field. All numerical entries are assumed to represent the corresponding
numerical value.