First restart the antenna process to reopen the communication link between the antenna computer and the SMCs:
UIP> ANTENNA /RESTART /NOSYNCHRONIZE Deleting process WEATHER_LOG Deleting process Tau monitor Deleting process ACQ_CLIENT Deleting process ANT_MCP Restarting ANT_MCP... Restarting ACQ_CLIENT... Restarting Tau monitor and WEATHER_LOG... UIP>
Then issue the FOCUS command and the LO command (with the /FORCE option) and see if there appears any error message like "SMC3 not responding" on the status display:
UIP> FOCUS UIP> LO 12CO2-1 /FORCE Do you want to move the sidecab mirrors? [N]Y Initiating movement of the sidecab mirrors Pausing to switch LO matrix and downconverter UIP>
Run the program showsems on the antenna computer to list the status of counting semaphores for the SMCs. The values of /sem_smc1, /sem_smc2 and /sem_smc3 should be one:
hau$ showsems
/sem_smc1: 1
/sem_smc2: 1
/sem_smc3: 1
...snip...
hau$
If not, first check if there is any smc program running or if the UIP is executing the FOCUS, LO or any other command which may change the status of the secondary mirror, receiver mirrors or instrument rotators. If the smc program is already running, then stop it. Do not send any UIP command.
If any one of those three semaphores is still zero or negative, use the program rmsems to delete it. The smc program explained below will create a new one automatically:
hau$ showsems
/sem_smc1: 1
/sem_smc2: 0
/sem_smc3: 1
...snip...
hau$ rmsems /sem_smc2
hau$ showsems
/sem_smc1: 1
/sem_smc2: does not exist
/sem_smc3: 1
...snip...
hau$
Run the program smc for the SMC you are having a problem and check if it is responding:
hau$ smc1 Opening SMC1... done smc1> status Motor 1: status = 74 = armed complete homed Motor 2: status = 74 = armed complete homed Motor 3: status = 10 = armed complete Motor 4: status = 74 = armed complete homed smc1> exit hau$
If the smc program hangs, you have to reset the SMC and home the motors as explained here, or you may have to power-cycle the SMCs and home all the motors as explained in the next section.
If the SMC is responding, restart the antenna process once again as explained above.
The following is a procedure to set up the SMCs for normal telescope operations:
More information about SMCs and related software can be found here.
Power-cycle the SMCs in the receiver room. Wait for one minute before turning the power on.
Run the program showsems on the antenna computer to list the status of counting semaphores for the SMCs. The values of /sem_smc1, /sem_smc2 and /sem_smc3 should be one:
hau$ showsems
/sem_smc1: 1
/sem_smc2: 1
/sem_smc3: 1
...snip...
hau$
If not, first check if there is any smc program running or if the UIP is executing the FOCUS, LO or any other command which may change the status of the secondary mirror, receiver mirrors or instrument rotators. If the smc program is already running, then stop it. Do not send any UIP command.
If any one of those three semaphores is still zero or negative, use the program rmsems to delete it. The smc program explained below will create a new one automatically:
hau$ showsems
/sem_smc1: 1
/sem_smc2: 0
/sem_smc3: 1
...snip...
hau$ rmsems /sem_smc2
hau$ showsems
/sem_smc1: 1
/sem_smc2: does not exist
/sem_smc3: 1
...snip...
hau$
Run the program smc on the antenna computer to reset the SMCs and load macros necessary for telescope operations:
hau$ smc1 Opening SMC1... done smc1> reset Resetting SMC1... done smc1> load Loading macros to SMC1... done smc1> exit hau$ smc2 Opening SMC2... done smc2> reset Resetting SMC2... done smc2> load Loading macros to SMC2... done smc2> exit hau$ smc3 Opening SMC3... done smc3> reset Resetting SMC3... done smc3> load Loading macros to SMC3... done smc3> exit hau$
If the reset command hangs, type ^C, restart the smc program, then try the reset command again:
hau$ smc1 Opening SMC1... done smc1> reset Resetting SMC1... ^C hau$ smc1 Opening SMC1... done smc1> reset Resetting SMC1... done smc1>
If the reset command still hangs after several retries, you have to power-cycle the SMCs again.
Home the receiver mirrors by running the shell script sidecab.home on hau:
hau$ sidecab.home
Opening SMC2... done
Resetting SMC2... done
Loading macros to SMC2... done
Homing motor #1 of SMC2... done
Homing motor #2 of SMC2... done
Homing motor #3 of SMC2... done
Homing motor #4 of SMC2... done
Homing motor #5 of SMC2... done
...snip...
Opening SMC1... done
Resetting SMC1... done
Loading macros to SMC1... done
Homing motor #1 of SMC1... done
Homing motor #2 of SMC1... done
...snip...
hau$
Home the secondary mirror by running the shell script secondary.home on hau:
hau$ secondary.home
Opening SMC3... done
Resetting SMC3... done
Loading macros to SMC3... done
Homing motor #1 of SMC3... done
Homing motor #2 of SMC3... done
Homing motor #3 of SMC3... done
Homing motor #4 of SMC3... done
...snip...
hau$
First reestablish the connection to the antenna computer and restart the necessary programs:
UIP> ANTENNA /RESTART /NOSYNCHRONIZE Deleting process WEATHER_LOG Deleting process Tau monitor Deleting process ACQ_CLIENT Deleting process ANT_MCP Restarting ANT_MCP... Restarting ACQ_CLIENT... Restarting Tau monitor and WEATHER_LOG... UIP>
Then try the FOCUS command and the LO command and make sure you do not get any error messages on the status display:
UIP> FOCUS UIP> ZA 44 UIP> LO 12CO2-1 /FORCE Do you want to move the sidecab mirrors? [N]Y Initiating movement of the sidecab mirrors Pausing to switch LO matrix and downconverter UIP>