270M
Rapid
Scanning Imaging Spectrograph
2
SPEX0000
Command
Protocol:
Each command sent
to
the driver is an ASCII string of not more than 128 characters.
There are several possible first characters in a command string (see below). Initial
spaces, line feeds, and carriage returns within commands are ignored. The commands
must end with a semicolon(;) to be interpreted by the driver. After the command
string has been processed, the internal command buffer is flushed and ready
to
receive the next command. A slash
(\)
is used
to
enter comments into a program.
Liberal use
of
comments is recommended
to
embed explanations that will be helpful in
Mure
program maintenance. Comments are ignored by the driver when the program
is running.
Character
FORf
I
or
i
Aor
a
R or r
Core
a
orq
as
or
qs
\
COMMANDS
Function
Set step frequencies for mono drive, slit drives, shutters, et
al.
Initialize system partial
or
full initialization.
Move device
to
absolute step position.
Move device to step position relative
to
current position.
Calibrate device (set
to
new step position).
Query step position of device.
Query number
of
states in system.
Comment.
2.1
Setting
Frequencies:
The device driver maintains frequency values in motor steps per second that it uses
to
regulate the speed at which devices are controlled. The frequencies are preset
to
default values, We recommend that you not change these frequencies. If you
do
not
use this command, the default values will be used. There are four different frequency
values, one for each
of
the four device types (mono, slit, shutter, de). These
. frequencies are adjusted by the following function call: -
SYNTAX:
"F [MONOFREQ] [SLITFREQ] [SHUTTERFREQ] [DCFREQ]
;"
Four parameters are expected regardless of whether you are setting all frequency
values
or
only one. Using a zero as a place holder tells the driver that you
do
not want
to
change the frequency for that particular device. Monochromator wavelength
60
Revised
November 24,
1992
Leica Microsystems, Inc.'s Ex. 1033
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