SPEC- ID4B¶

Welcome to ID4B SPEC command¶

"spec is internationally recognized as the leading software for instrument control and data acquisition in X-ray diffraction experiments."

Few important commands are shown below.

Important SPEC commands¶

• mkdir - Create a new directotry.
• a2scan - two-motor scan.
• abscan - incident-reflected angle scan.
• br - br and ubr - move to the reciprocal space coordinates (HKL).
• ca - calculate motor settings for a given point in reciprocal space
• cal - calculate motor settings for a given point in reciprocal space
• cat - UNIX shell cat command
• cd - change working directory
• cmAX - Compumotor AX motor controller
• config - edit the hardware configuration
• config_adm - configuration - administer hardware configuration file
• constant - define a constant global symbol
• counting - timer/scaler commands, macros and variables
• cscan - Continuous Scans
• ct - count and print results
• dscan/lup - motor scan relative to the starting position
• d2scan - two-motor scan relative to the starting positions
• def - def and rdef - define a macro
• disable - disable and enable - Disable and Enable Hardware
• do - execute a command file
• dtscan - relative temperature scan
• dxp - XIA DXP CAMAC MCA
• encode - encode()/decode() - data stream manipulation
• epics - EPICS specific functions
• files - conventions for file/device output
• flow - flow control
• flyscan - Continuous Scans with Multichannel Scalers
• fourc - 4-circle geometry modes
• funcs - functions - built-in functions
• global - declare global variables
• getE - get the energy
• getroi - get the region of interest
• hbeamscan - Horizontal direction beam scan based on start, finish, interval and time arrguments
• history - command recall facility
• hklscan - general linear scan in reciprocal space
• hscan - scan along the H-axis in reciprocal space
• install - spec installation procedure
• l - UNIX file listing
• libedit - libedit/readline - command line recall and editing
• lm - list motor software limits
• ls - UNIX file listing
• lscan - scan along the L-axis in reciprocal space
• lup chi - motor 'chi' scan relative to the starting position
• lup th - motor 'th' scan relative to the starting position
• lup tth - motor 'two theta' scan relative to the starting position
• lup phi - motor 'phi' scan relative to the starting position
• macros - description of macro facility
• matchUE - match undulator energy
• maxk - maximum position at k reciprocal space
• wm monchi - where is monochromator chi
• mk / umk - move to the reciprocal space coordinates (HKL)
• mono - monochromator - monochromator control macros
• motors - commands and functions for controlling motors
• move_info - move_info() - returns what would happen on a move
• moveE - move the energy
• mr - move to a given angle of specular reflection
• mv - mv and umv - move one motor
• mvd - move a motor in dial units
• mvr - mvr and umvr - move a single motor relative to its current position
• umv th CEN - move theta motor to center
• mond - monocromator d posiiron
• montrav - monochromator in trnasverse direction
• newvbeam - new beam position based on vertical beam or horizontal beam scan
• newfile - data file management
• newmac - re-read the standard macro definitions
• nu - ???????
• or0 -
• or1 -
• or_swap -
• os1 - optical slit 1 position to 0
• os2 - optical slit 1 position to 0
• pwd - print spec's current working directory
• pa -
• park6m - park the 6M PILATUS detector to 175m (x), 924.5m (y) and 200m (z) in directions
• pil_von - PILATUS video on
• pil_voff - PILATUS video off
• pil_setdir - PILATUS set directory
• pil_setup PIL6 - PILATUS setup
• pil_settrig "Internal" -
• pil_unsetup 0 - PILATUS unset
• pl_xMAX - show the maximum value of the plot in x-direction
• plotselect pilroi - plot select PILATUS ROI
• qdo - execute a command file without echo
• quickfly -
• quick_collect -
• rscan - specular reflectivity scan
• r2scan - reflectivity background scans
• readline - libedit/readline - command line recall and editing
• resume - continue an aborted scan
• roi - region of Interest counters
• samz - moving sample z direction
• scans - scans and scans.4 - read data from ASCII spec data format scan files
• server - spec server/client - issue commands and control hardware remotely
• set - define the user angle of a motor
• setfilter - set filter
• set_dial - define the dial position of a motor
• setlat - set lattice
• set_lm - set lower and upper software limits
• set_sim - set simulate (no hardware) mode
• setplot - set plotting options
• setpowder - configure powder-averaged scans
• setscans - configure scan options
• showtemp - display the current temperature
• sharpopt -
• sixc - 6-circle geometry modes
• spec - spec, fourc, twoc, surf, etc. - X-ray diffractometer operation for specific configurations
• spec_menu - spec_menu() - create interactive menu from specifications
• spec_par - spec_par() - sets internal parameters
• splot - plot the plotselect of specific values
• syncE - synchronize E
• tw tabzd tabzui tabzuo - tewak table
• te - read or set the temperature
• teramp - ramp the temperature to a new set point
• tscan - temperature scan
• th2th - theta two theta scan
• tw - "tweak" motors
• tweakup - scan the monochromator in d direction (mond), go to the midlle and scan the undulator and move to the highest position
• unkludgenu - ??????
• vi - invokes the standard UNIX visual editor
• vscan - Variable Step Size Scans
• vbeamscan - Vertical direction beam scan based on start, finish, interval and time arrguments
• w - wait for moving and counting and then beep
• wa - list all motor positions
• wait - wait() - synchronization with moving, counting and other activity
• wfilter - where is filters
• wideopt -
• diftabx - diffractometer movement in x directions
• diftabz - diffractometer movement in z directions
• wh - where, principal axes and reciprocal space
• whats - identify what an object is
• wm - print information about one or more motors
• wmono - where is monochromatic beam
• wmonoall - where motor and their position including the motors, phi and filters
• wmonoall - where is mirror position
• wot - where is optical tables
• ws1 - where is first slit
• ws2 - where is second slit
• w6m - where is 6M detector
• wslits - where is both slit 1 and slit 2

If you encounter any new commands during your sample run, please send an email and we will add that to the list .