Package: M2

Description:  Control of mirror M2, like focusing, tilting, centering and beacon.

Package name: m2

Inheritance:  LCU Server Framework <<SubSystem>>lsfSERVER

Controlled HW Devices: 

• <<Serial Device>>mirror:lsfSERIAL
  • Database: atm2DB_MIRROR:lsfDB_RS232

Controlled SW Devices: 

• <<Software Device>>aubcn:lsfSOFTDEV
  • Database: atm2DB_BEACON:lsfDB_SOFTDEV

  Deployment:  Altitude LCU: atm2Server

  Use Case diagram: 

  

  Class diagram: 

  

  Architecture: 

  This Software Device is instantiated from the LCU Server Framework lsf.
  The sub-class <<SW Device>>atm2Server:lsfSERVER is composed of an instance of the serial communication class <<Serial Device>>mirror:lsfSERIAL and of one instance of the software device class <<Software Device>>aubcn:lsfSOFTDEV.

  The PMAC Hexapod controller hardware is driven, via a converter RS232-RS422, by the serial communication port /tyCo2 available on the LCU Transition Module. The protocol is ASCII, 9600 bauds, 8 bits, no parity, no handshake.

  The interface layer for the protocol to the PMAC board and between high level coordinates (x,y,z,a,b) and hexapod positions (6 axis) is implemented by the supplier CSEM as the functions pmacParseCommand() and pmacParseReply().

  

  The Software Device atm2Server provides the following Specific Commands for the control of the mirror:

  • GETCPOS and SETCPOS: to set and get the Center Position
  • GETFPOS and SETFPOS: to set and get the Focus Position
  • GETTILT and SETTILT: to set and get the Tilt angles
  and 3 specific commands for the control of the pupil beacon:
  • SETPBCN: to switch On and Off the beacon.
  • GETPBCN: to get the beacon status.
  • SETPBLV: to set the light level of the beacon.

  Commands SETxxxx / GETxxxx

  These 6 commands are transient instances resp. of the classes:
  <<Control>>m2GETCPOS:lsfCOMMAND_HANDLER,
  <<Control>>m2SETCPOS:lsfCOMMAND_HANDLER,
  <<Control>>m2GETFPOS:lsfCOMMAND_HANDLER,
  <<Control>>m2SETFPOS:lsfCOMMAND_HANDLER,
  <<Control>>m2GETTILT:lsfCOMMAND_HANDLER,
  <<Control>>m2SETTILT:lsfCOMMAND_HANDLER.

  They invoke the inherited methods lsfRS232::lsfSerialRead() and lsfRS232::lsfSerialWrite().

  Sequence diagram:

  

  This device is intended to be used mainly for optical alignments, thus no active control is foreseen during observation.

  Commands SETPBCN, GETPBCN, SETPBLV

  These 3 commands are transient instances resp. of the classes:
  <<Control>>m2GETPBCN:lsfCOMMAND_HANDLER,
  <<Control>>m2SETPBCN:lsfCOMMAND_HANDLER,
  <<Control>>m2SETPBLV:lsfCOMMAND_HANDLER.

  They invoke the inherited methods lsfSOFTDEV::lsfForwardCommand(). The commands are routed to the module aubcn, that is the generic VLTI beacon controller. For the pupil beacon an halogen lamp is assigned that may not be switched on together with one of the Nasmyth beacons.

  Sequence diagram:

  

  Activity diagram:

  

  Command Definition Table: atm2Server.cdt

  Command Interpreter Table: atm2Server.cit

  Reuse from VLT TCS: New package

  Issues to be Determined or Resolved: None
  

  Last modified: Wed Jun 27 08:10:53 UTC 2001