If data collection stalls and there are no error messages it is time to
halt the various applications and restart them. A complete restart is
detailed below.
Stop the ADX application on the data collection computer by
typing "stop_ccd" in a terminal window, or by using the
EXIT button of the main ADX menu (select ADX). If the
crystal-centering
and rspec processes are also running, use "stop_ccd_plus"
instead, or select All in the EXIT pop-up window,
to stop all processes. Note that if you restart ADX alone while
the centering program keeps running, the programs will not
communicate properly; the same problem happens with rspec in the case
where it must talk to ADX (i.e. on F2).
Stop the detector control application on the PC which runs the CCD by clicking
on the X in the upper right corner of the det_api or
OPERATE Detector window.
For Q-210 and Q-270 - switch to each other PC (there are a total of two
PC's for Q-210 # 441 (at A-1) and four PC's for Q-210 # 448 (at F-2) and the
Q-270), using
the button module at the bottom of the control rack (for # 441, use the
CHANNEL button to step between PC's; to get from 2 to 1 you must step up
to 8 and then on to 1) or the back of the keyboard tray.
Stop the detector control application on each PC.
Start the application on the PC(s):
- For the Q-4: double click on the blue Q4 Program icon.
You should see "system properly initialized" as the last message
in the det_api window.
- For the Q-210 and Q-270: on each PC, double click on the
OPERATE
Detector icon. You should see a screenful of messages in the OPERATE
Detector window, ending with "mod_load_tables: any_fail: 0"
for the A1 detector and "initialization complete" for the others.
Start the ADX application on the data collection
computer by typing
"start_ccd" (for ADX only) or "start_ccd_plus"
(for ADX, centering, and rspec) in
a terminal window, or by clicking Collect Data on the desktop.
At F1 only, use "start_ccd_q270" or "start_ccd_q4"
(or the corresponding "start_ccd_plus_q.." commands_ to select
the desired detector.
You should see several windows appear, and no error messages. If you are
starting crystal-centering, it will take some time for everything to get going
- please be patient. The centering window normally appears on the data
collection computer, but may be set to be on the station computer, if
desired.
For MAD data collection (on F2), rspec is normally
started up with the "start_ccd_plus" command on the data
collection computer. If it is necessary to start it separately, do this
on the station computer by clicking RSpec on the desktop.
An OpsTerm window and a CHESS spec functions panel will be posted,
also a window titled ccd_bl_station in which messages about
"connecting to guideline" and "got LAMBDA" should appear.
For monochromatic data collection, rspec is independent
of ADX; it is not necessary
to restart it when restarting ADX, although it will do no harm to do
so using "start_ccd_plus". If the OpsTerm
window or the CHESS spec functions panel gets hung up or is acting
strangely, you can stop and
restart rspec using the Stop RSpec and RSpec
buttons on the desktop of the station computer.
Collect some data.
If there is still a problem you can verify that there is communication
with the Compumotor by using the ADX Manual Control window
to advance
the spindle a few degrees while observing the rotation on a video monitor.
Data transfer to and from Compumotor can be observed by deiconifying the window
ccd_bl_cm. Each time the Compumotor finishes a motion
it returns "CMD_DONE", which appears in this window.
If it appears that communication is not working correctly proceed to
step 6.
Stop data collection with "stop_ccd" or
"stop_ccd_plus". Cycle the power on the Compumotor Isobar power strip
located at the bottom of the Compumotor cabinet (in A1, this switch is on
the back side of the cabinet). A number of LED's on the units in the
cabinet should come on. Restart data collection with "start_ccd" or
"start_ccd_plus".
If these steps do not get data collection going again, ask the CHESS
operator for help.