= Trouble Shooting - Drivectrl

== Cosy in state Error

__Symptom__

- drivectrl and Cosy in state ERROR
- drivectrl and Cosy in state ARMED (when just the Tracking stopped accidently)

__Solution__

- DRIVECTRL/RESUME

The RESUME command will proceed the following steps (so only RESUME is necessary to solve the Drive Error):

- DRIVECTRL/STOP (now drivectrl shut be in state armed)
- DRIVECTRL/TRACK_SOURCE x y sourcename
 - last Tracking command: see output of dimctrl 
 - see [[datatakingdetails#pointingpositions Current Pointing Positions]]

__Not Helping__

- all other

== drivectrl in state ERROR [=#DriveControlError]

__Symptom__

- drivectrl in state ERROR
- sending a STOP via dim is ineffective

__Solution__

- go to /home/fact/operation
- restart drive control: "dimctrl —restart DRIVE_CONTROL"
- follow the command line output of drive control: "follow.sh drivectrl"

__Remark__

- Be patient and wait for the service to reboot !!!

== drivectrl in state 3

__Symptom__

- drivectrl is in status LOCKED

__Solution__

- drivectrl goes in this status when the sun is rising, so if this "problem" occurs in the morning it is properly not a problem, it's only the way the telescope should behave, due to the rising sun
- if this problem occurs during startup, you have to unlock the telescope:
 - DRIVECTRL/UNLOCK

__Not Helping__

- DRIVECTRL/STOP
- killing / quiting drivectrl or cosy

== Manual parking of the telescope

__Symptom__

- drivectrl and Cosy don't accept / react to commands, for example an error with the IndraDrives occur

__Solution__

- if it's not to late in the night, try to call an expert before you park manually
- Park the telescope manually:

0. Proceed all parts of the Shutdown procedure you can do in the current situation (see [[shutdown here]])
 - be sure the bias voltage is OFF!
 - wear a helmet when going to the telescope
0. there are two bars near the door, to move the telescope in the azimuth and zenith direction:
 - long bar: zenith
 - short bar: azimuth
0. These bars, you can use for turning the telescope manually on the spots provided for this
 - azimuth: below the telecope
 - zenith: right of the mirrors
 - be aware that you don't turn in a way, that the cables get damaged
0. Turn the telescope in the Parking Position (pointing north, towards the old container)