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This command is used to enter a setup menu, where some of the SLS sensor’s
internal parameters can be modified. This is an interactive menu, which demands
the use of an ANSI terminal (or a PC running an ANSI terminal emulation
program). Before the setup menu is shown, the user must enter the password after
the PWD> reply from the probe.
Command:
$SELCAT>
Parameter: Options: Keyb:
Measurement
Units:
LSBs/Millimeters/Inches Tab-key
Protocol Type: ASCII/Binary Tab-key
Interface: Selcom/RS-422 Tab-key
Samples Per
Average:
1 - 1024 Num. Keys + Enter
Valid threshold
(%)
10 - 90 Num. Keys + Enter
Analog Output
On Invalid:
Hold Latest Valid/Output
Zero
Tab-key
F1 = Save And
Exit
F1
F2 = Save Do
Not Exit
F2
F3 = Exit Do
Not Save
F3
Illegal commands
Command: $Q> (as an example of an illegal command)
Reply:
All commands, which are illegal, have parameters with values outside the legal
range, or contain too many characters (more than 12) will be rejected by the SLS
sensor and cause the reply shown above.
Binary replies (RS-232)
The SLS sensor can be set up to give binary replies over RS-232. The primary
reason for using this mode would be to speed up the data transfers and to make the
master’s job easier in decoding the SLS sensor’s output. Only a subset of the
commands described in section Conventions can be used with binary replies. For
instance, it would be impossible or at least rather complicated to transmit a
fractional value in binary mode.
Note:
Only the replies are binary. The commands sent by the master to the SLS sensors
are the same as in ASCII reply mode.
Reply structure
In binary mode the reply to each command has a leading identifier, which consists
of one byte, but there is no trailing prompter. In the replies to batch commands
only one identifier is output for the whole batch, i.e. no identifying byte is
prefixed to each data item. This means that the master must keep a correct count
of received bytes in order to decode data properly and to know when the next
command can be sent. This is especially important in the batch commands where
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