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Comandi aggiuntivi Field System G. Maccaferri |
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Scu Control and monitor new subreflector
Sintax: scu=<conf >[,paxe1,…paxen]
Reply: scu/link,track,mode,config,status,paxe1,…,paxen
Settable parameters
| conf |
Configuration mode. Code of one of the station available receivers (kkp,sxp,etc.). The file rec.ctl has a list of available receivers. Some of them are located on primary focus, some others are in the secondary one. The primary receivers have a two axis system mechanism (Y in N/S direction and Z on paraboloid focus axis). Secondary receivers have a five axis mechanical positioning system (X on E/W, Y on N/S; Z1, Z2,Z3 on paraboloid focus axis, 120° each other, z1 N, z2 S/E, z3 S/W). The system will be automatically switched (primary mode, secondary mode) on request. Conf could also be connect or disconnect, in order to open or close scu -FS link (scu=connect should be normally included in the iniz procedure executed at FS startup) |
| paxe1-n | Optional fixed position for one or more axis. If an axe is unspecified it will be tracked vs elevation by a profile described in a four order polynome, one for each axis. All of these data are contained in the related receiver configuration file (for example scukkp.ctl, scusxp.ctl,…). The axis sequence must be issued like Y,Z for primary receivers, X,Y,Z1,Z2,Z3 for secondary ones.The typical FS syntax could be used to specify default values (i.e. scu=kkp,55.0,*,68.2,,, ) |
Read only parameters
| link | connected|nolink | Scu computer socket connection status |
| track | tracking|fixed | Scu positioning mode. The axis positions are normally updated for each deg of elevation (tracking), except for axis with a fixed specified positions, which are kept at user specified positions. This flag report fixed only when all of them are not in tracking. |
| primary|secondary | Scu operating mode. This is determined by the receiver configuration described in rec.ctl file and automatically applied at the configuration selection. Tipically the last letter of configuration mnemonic code (kkp,chc,etc.) helps to understand the focus required. | |
| config lrf | The configuration mnemonic code is defined in rec.ctl file. l and r rappresent the code frequencies for left and right polarizations, f the receiver location (p primary, c cassegrain) | |
| status | ok|nok |
This flag summarizes all conditions necessary to consider scu well working.They are: -all axis powered on, unbraked and calibrate -all axis under loop position with position error < 0.01mm -scu positions and configuration matches the last command issued |
| paxe1,n | Axis actual position in mm |
Note: The command manages the scu control and monitor protocol between the scu computer and FS. In tracking mode, the position of each axe is determined by a four order polynome, stored in a receiver specific file. When a receiver is selected, a table with axis positions specified every deg. of elevation is predetermined and loaded in memory for tracking use. Otherwise the fixed mode can be activated by specifing a fixed position for each axe. An alternative and more definitive way for receiver configuration using no tracking is to set zero all the polynome terms except for the offset.
scu=kkp set kkp tracking mode
scu=sxp,10,12.3 set sx primary receiver, fixed mode at user specified positions (y=10mm, z=12.3mm).
scu=connect establish scu computer connection
