Starting the Servers

STARTING THE SERVERS

The observatory requires a number of continuously running programs otherwise known as servers or daemons. There are several levels:

telco is the highest level server that reads the database and executes the programs that take the data
Below it is the telescope server known as tserver. tserver is not actually the server but a program that glues together the actual device servers into one place
Below this are the other servers such as rctel rstage rslit rleach rmanta and others
Finally there is weatherd the weather server daemon

CHECKING THE SERVERS

By running the script show proc you should an output like.

rct      1634782       1  0  2022 ?        S      0:15 /bin/csh /home/rct/bin/weatherd
rct       264528       1  0  2022 ?        S      0:01 bulld
rct       792656       1  0 Jan11 ?        Sl     0:32 rleach port=0x1345 debug
rct       792634       1  0 Jan11 ?        Sl     2:23 rmanta port=0x1344 camera=guider debug
rct      4128703       1  0  2022 ?        Sl     8:33 rslit port=0x1342
rct      4000661       1  0  2022 ?        S      0:00 rstage port=0x1343
rct       482774  482773  0 Jan10 ?        Sl     0:00 rtel port=0x1341 debug=9 wallace=/home/rct/Documents/Pointing/jan2020.tpt
rct       792664       1  0 Jan11 ?        Sl     0:00 tserver port=0x1341 port=0x1342 port=0x1343 port=0x1344 port=0x1345
other processes
rct      1209789 1634782  0 18:38 ?        S      0:00 sleep 894

There should be:

rtel listening on port 0x1341
rslit listening on port 0x1342
rstage listening to port 0x1343
telco daemon
tserver gluing five servers
weatherd
bulld

The tserver program then cements all these servers

If you see multiple copies of tserver for long periods, then the server is hung. tserver will fork when carrying out multiple tasks but these will eventually terminate.

STARTING THE SERVERS

startnet. You must be logged in as the rct user to run this script. In theory the startnet script should be able to restart everything when you invoke it without arguments.

Sometimes you may have to restart say rstage then try the following:

killall rstage
startnet

REMOVING THE SEMAPHORES

There is a very occasional problem that the semaphores that are used to regulate communication with the serial server fail to release. This has caused some unexplained hangs in the individual servers. To clear them execute the following script.

rmsem

You can view the semaphores with the ipcs command.

REBOOTING THE SERIAL SERVER

If you get a message like unable to connect to to 140.252.58.15 it is possible that the ESR904 terminal server is hung. To restart it do the following:

login as rct
Use the show proc to determine the servers
kill the tserver process
kill the rctel, rslit,rstage servers
Fire up a brower and connect to http://esr904
In the window press the Reset button
Answer yes to "are you sure
Restart the servers as above

Note: the serial server can be rebooted via telnet.

telnet esr904
use down arrow to select Configuraation
Hit Enter key
Use down arrow key to select Reset
Hit Enter
Hit Enter to answer yes
Wait 30 seconds

Note: If you need to bailout of telnet:

Type:  Cntrl^]
To the prompt: telnet>  type quit.

RESTARTING LEACH CONTROLLER

The CCD controller has a large number of states that it can enter that may not be the ones you want. To reset the controller (I think) execute the following list of commands.

tx ccd_setup reset tim util pon tset=-100

One very simple test of the controller is to type in the command.

tx ccd_status

and see if the tchip is reasonable (i.e. around -100C).

RESTARTING THE PMAC

Warning: this procedure is not for the faint of heart. It should not be done lightly as it will reset many internal flags of the motor controller and may take a while to get things running again.

To reset the pmac like a power off restart type the following quotes and all
echo '$$$' | pputs ether=esr904,4000

You will now have to rehome ALL the motors.

tx home2 x y z fw1 fw2
tx home focus             # this takes a LONG time
tx home az
tx home ha dec

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