FSS Aperture Field Diaphragm


 
 
E
S
O

o 
n 
l 
y

  • Control of the Aperture Field Diaphragm before the FSS detector. 

    • The motor and tacho are connected to the ESO standard VME4SA Servo Amplifier and the encoder to the MAC4 Motion Controller. The tacho generator is mounted on the motor. The velocity loop is closed in the amplifier. There are two switches; one of them is used as a reference switch. 
     
  • The control is deployed on the Sensor LCU. 
  • The device is connected to the Terminal Block Y34. 
The motor control is a pure SW interface: the target reference position and Velocity are passed to the Motion Controller via the VME bus. The motor control software is provided by ESO. 

FSS Aperture Field Diaphragm interfaces:

The connection layout and pin assignment is given in Annex 1 VLT-DWG-ESO-15154-1787
Item
From
To
Signal
Description
MOTOR: Model TBD
TBDVDC, TBDW
1 LCU ATS Motor M+ VME4SA Servo Amplifier Channel #2
2 LCU ATS Motor M- VME4SA Servo Amplifier Channel #2
3     Shield MSH  
TACHOGENERATOR: Model TBD
TBDmV / rpm
4 ATS LCU Tacho T+ VME4SA Servo Amplifier Channel #2
5 ATS LCU Tacho T- VME4SA Servo Amplifier Channel #2
6     Shield TSH  
ENCODER: Model TBD
5 VDC - TDB counts/turn - Resolution = TBD counts/degree = TBD"/count
7 LCU ATS Encoder 5V VCC MAC4-INC Motion Controller Channel #2
8 LCU ATS Encoder GND MAC4-INC Motion Controller Channel #2
10 ATS LCU Encoder A+ Differential line driver A+
MAC4-INC Motion Controller Channel #2
11 ATS LCU Encoder A- Differential line driver A-
MAC4-INC Motion Controller Channel #2
13 ATS LCU Encoder B+ Differential line driver B+
MAC4-INC Motion Controller Channel #2
14 ATS LCU Encoder B- Differential line driver B-
MAC4-INC Motion Controller Channel #2
16 ATS LCU Encoder I+ Differential line driver I+
MAC4-INC Motion Controller Channel #2

E
S
O

o 
n 
l 
y

17 ATS LCU Encoder I- Differential line driver I-
MAC4-INC Motion Controller Channel #2
18     Shield   
SWITCHES: Model TBD
TBDV, TBDA max. - Repeatability=TBDdegree
18 ATS LCU Reference switch (NC)   MAC4-INC Motion Controller Channel #2
18 ATS LCU Reference switch (COM)   MAC4-INC Motion Controller Channel #2
18     Shield   
18     Global shield   PE


Last modified: Wed 16-May-2001 17:26